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  2. 

  3. <!DOCTYPE html>
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  4. <!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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  5. <!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
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  8.   <meta name="viewport" content="width=device-width, initial-scale=1.0">
    9. 

  9.   
    10. 

  10.   <title>URI Class &mdash; CodeIgniter 3.1.11 documentation</title>
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  11.   
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  15.     <link rel="shortcut icon" href="../_static/ci-icon.ico"/>
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  36.     <link rel="top" title="CodeIgniter 3.1.11 documentation" href="../index.html"/>
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  37.         <link rel="up" title="Libraries" href="index.html"/>
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  38.         <link rel="next" title="User Agent Class" href="user_agent.html"/>
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  39.         <link rel="prev" title="Unit Testing Class" href="unit_testing.html"/> 
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  72. <li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
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  73. <li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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  91. </li>
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    94. 

  94. <li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
    95. 

  95. <li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
    96. 

  96. <li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
    97. 

  97. <li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
    98. 

  98. <li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
    99. 

  99. <li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
    100. 

  100. <li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
    101. 

  101. <li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
    102. 

  102. <li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
    103. 

  103. <li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
    104. 

  104. <li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
    105. 

  105. <li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
    106. 

  106. <li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
    107. 

  107. <li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
    108. 

  108. <li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
    109. 

  109. <li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
    110. 

  110. <li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
    111. 

  111. <li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
    112. 

  112. <li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
    113. 

  113. <li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
    114. 

  114. <li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
    115. 

  115. <li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
    116. 

  116. <li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
    117. 

  117. <li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
    118. 

  118. <li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
    119. 

  119. <li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
    120. 

  120. <li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
    121. 

  121. </ul>
    122. 

  122. </li>
    123. 

  123. </ul>
    124. 

  124. <ul class="current">
    125. 

  125. <li class="toctree-l1 current"><a class="reference internal" href="index.html">Libraries</a><ul class="current">
    126. 

  126. <li class="toctree-l2"><a class="reference internal" href="benchmark.html">Benchmarking Class</a></li>
    127. 

  127. <li class="toctree-l2"><a class="reference internal" href="caching.html">Caching Driver</a></li>
    128. 

  128. <li class="toctree-l2"><a class="reference internal" href="calendar.html">Calendaring Class</a></li>
    129. 

  129. <li class="toctree-l2"><a class="reference internal" href="cart.html">Shopping Cart Class</a></li>
    130. 

  130. <li class="toctree-l2"><a class="reference internal" href="config.html">Config Class</a></li>
    131. 

  131. <li class="toctree-l2"><a class="reference internal" href="email.html">Email Class</a></li>
    132. 

  132. <li class="toctree-l2"><a class="reference internal" href="encrypt.html">Encrypt Class</a></li>
    133. 

  133. <li class="toctree-l2"><a class="reference internal" href="encryption.html">Encryption Library</a></li>
    134. 

  134. <li class="toctree-l2"><a class="reference internal" href="file_uploading.html">File Uploading Class</a></li>
    135. 

  135. <li class="toctree-l2"><a class="reference internal" href="form_validation.html">Form Validation</a></li>
    136. 

  136. <li class="toctree-l2"><a class="reference internal" href="ftp.html">FTP Class</a></li>
    137. 

  137. <li class="toctree-l2"><a class="reference internal" href="image_lib.html">Image Manipulation Class</a></li>
    138. 

  138. <li class="toctree-l2"><a class="reference internal" href="input.html">Input Class</a></li>
    139. 

  139. <li class="toctree-l2"><a class="reference internal" href="javascript.html">Javascript Class</a></li>
    140. 

  140. <li class="toctree-l2"><a class="reference internal" href="language.html">Language Class</a></li>
    141. 

  141. <li class="toctree-l2"><a class="reference internal" href="loader.html">Loader Class</a></li>
    142. 

  142. <li class="toctree-l2"><a class="reference internal" href="migration.html">Migrations Class</a></li>
    143. 

  143. <li class="toctree-l2"><a class="reference internal" href="output.html">Output Class</a></li>
    144. 

  144. <li class="toctree-l2"><a class="reference internal" href="pagination.html">Pagination Class</a></li>
    145. 

  145. <li class="toctree-l2"><a class="reference internal" href="parser.html">Template Parser Class</a></li>
    146. 

  146. <li class="toctree-l2"><a class="reference internal" href="security.html">Security Class</a></li>
    147. 

  147. <li class="toctree-l2"><a class="reference internal" href="sessions.html">Session Library</a></li>
    148. 

  148. <li class="toctree-l2"><a class="reference internal" href="table.html">HTML Table Class</a></li>
    149. 

  149. <li class="toctree-l2"><a class="reference internal" href="trackback.html">Trackback Class</a></li>
    150. 

  150. <li class="toctree-l2"><a class="reference internal" href="typography.html">Typography Class</a></li>
    151. 

  151. <li class="toctree-l2"><a class="reference internal" href="unit_testing.html">Unit Testing Class</a></li>
    152. 

  152. <li class="toctree-l2 current"><a class="current reference internal" href="#">URI Class</a></li>
    153. 

  153. <li class="toctree-l2"><a class="reference internal" href="user_agent.html">User Agent Class</a></li>
    154. 

  154. <li class="toctree-l2"><a class="reference internal" href="xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
    155. 

  155. <li class="toctree-l2"><a class="reference internal" href="zip.html">Zip Encoding Class</a></li>
    156. 

  156. </ul>
    157. 

  157. </li>
    158. 

  158. </ul>
    159. 

  159. <ul>
    160. 

  160. <li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul>
    161. 

  161. <li class="toctree-l2"><a class="reference internal" href="../database/examples.html">Quick Start: Usage Examples</a></li>
    162. 

  162. <li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li>
    163. 

  163. <li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li>
    164. 

  164. <li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li>
    165. 

  165. <li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li>
    166. 

  166. <li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li>
    167. 

  167. <li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li>
    168. 

  168. <li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li>
    169. 

  169. <li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li>
    170. 

  170. <li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li>
    171. 

  171. <li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li>
    172. 

  172. <li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li>
    173. 

  173. <li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li>
    174. 

  174. <li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li>
    175. 

  175. </ul>
    176. 

  176. </li>
    177. 

  177. </ul>
    178. 

  178. <ul>
    179. 

  179. <li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
    180. 

  180. <li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
    181. 

  181. <li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
    182. 

  182. <li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
    183. 

  183. <li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
    184. 

  184. <li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
    185. 

  185. <li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
    186. 

  186. <li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
    187. 

  187. <li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
    188. 

  188. <li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
    189. 

  189. <li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
    190. 

  190. <li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
    191. 

  191. <li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
    192. 

  192. <li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
    193. 

  193. <li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
    194. 

  194. <li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
    195. 

  195. <li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
    196. 

  196. <li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
    197. 

  197. <li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
    198. 

  198. <li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
    199. 

  199. <li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
    200. 

  200. <li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
    201. 

  201. </ul>
    202. 

  202. </li>
    203. 

  203. </ul>
    204. 

  204. 

  205.       </div>
    206. 

  206.     
    207. 

  207.       
    208. 

  208.   </div>
    209. 

  209. </div>
    210. 

  210. <div id="nav2">
    211. 

  211.   <a href="#" id="openToc">
    212. 

  212.     <img src="data:image/jpeg;base64,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" title="Toggle Table of Contents" alt="Toggle Table of Contents" />
    213. 

  213.   </a>
    214. 

  214. </div>
    215. 

  215. 

  216.   <div class="wy-grid-for-nav">
    217. 

  217. 

  218.     
    219. 

  219.     <nav data-toggle="wy-nav-shift" class="wy-nav-side">
    220. 

  220.       <div class="wy-side-nav-search">
    221. 

  221.         
    222. 

  222.           <a href="../index.html" class="fa fa-home"> CodeIgniter</a>
    223. 

  223.         
    224. 

  224.         
    225. 

  225. <div role="search">
    226. 

  226.   <form id="rtd-search-form" class="wy-form" action="../search.html" method="get">
    227. 

  227.     <input type="text" name="q" placeholder="Search docs" />
    228. 

  228.     <input type="hidden" name="check_keywords" value="yes" />
    229. 

  229.     <input type="hidden" name="area" value="default" />
    230. 

  230.   </form>
    231. 

  231. </div>
    232. 

  232.       </div>
    233. 

  233. 

  234.       <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
    235. 

  235.         
    236. 

  236.           
    237. 

  237.           
    238. 

  238.               <ul>
    239. 

  239. <li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
    240. 

  240. </ul>
    241. 

  241. <ul>
    242. 

  242. <li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
    243. 

  243. <li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
    244. 

  244. <li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
    245. 

  245. <li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
    246. 

  246. <li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
    247. 

  247. </ul>
    248. 

  248. </li>
    249. 

  249. </ul>
    250. 

  250. <ul>
    251. 

  251. <li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
    252. 

  252. <li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
    253. 

  253. <li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
    254. 

  254. <li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
    255. 

  255. <li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
    256. 

  256. <li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
    257. 

  257. <li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
    258. 

  258. </ul>
    259. 

  259. </li>
    260. 

  260. </ul>
    261. 

  261. <ul>
    262. 

  262. <li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul>
    263. 

  263. <li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li>
    264. 

  264. <li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li>
    265. 

  265. <li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
    266. 

  266. <li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
    267. 

  267. </ul>
    268. 

  268. </li>
    269. 

  269. </ul>
    270. 

  270. <ul>
    271. 

  271. <li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
    272. 

  272. <li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
    273. 

  273. <li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
    274. 

  274. </ul>
    275. 

  275. </li>
    276. 

  276. </ul>
    277. 

  277. <ul>
    278. 

  278. <li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
    279. 

  279. <li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
    280. 

  280. <li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
    281. 

  281. <li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
    282. 

  282. <li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
    283. 

  283. <li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
    284. 

  284. <li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
    285. 

  285. <li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
    286. 

  286. <li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
    287. 

  287. <li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
    288. 

  288. <li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
    289. 

  289. <li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
    290. 

  290. <li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
    291. 

  291. <li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
    292. 

  292. <li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
    293. 

  293. <li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
    294. 

  294. <li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
    295. 

  295. <li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
    296. 

  296. <li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
    297. 

  297. <li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
    298. 

  298. <li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
    299. 

  299. <li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
    300. 

  300. <li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
    301. 

  301. <li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
    302. 

  302. <li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
    303. 

  303. <li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
    304. 

  304. <li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
    305. 

  305. </ul>
    306. 

  306. </li>
    307. 

  307. </ul>
    308. 

  308. <ul class="current">
    309. 

  309. <li class="toctree-l1 current"><a class="reference internal" href="index.html">Libraries</a><ul class="current">
    310. 

  310. <li class="toctree-l2"><a class="reference internal" href="benchmark.html">Benchmarking Class</a></li>
    311. 

  311. <li class="toctree-l2"><a class="reference internal" href="caching.html">Caching Driver</a></li>
    312. 

  312. <li class="toctree-l2"><a class="reference internal" href="calendar.html">Calendaring Class</a></li>
    313. 

  313. <li class="toctree-l2"><a class="reference internal" href="cart.html">Shopping Cart Class</a></li>
    314. 

  314. <li class="toctree-l2"><a class="reference internal" href="config.html">Config Class</a></li>
    315. 

  315. <li class="toctree-l2"><a class="reference internal" href="email.html">Email Class</a></li>
    316. 

  316. <li class="toctree-l2"><a class="reference internal" href="encrypt.html">Encrypt Class</a></li>
    317. 

  317. <li class="toctree-l2"><a class="reference internal" href="encryption.html">Encryption Library</a></li>
    318. 

  318. <li class="toctree-l2"><a class="reference internal" href="file_uploading.html">File Uploading Class</a></li>
    319. 

  319. <li class="toctree-l2"><a class="reference internal" href="form_validation.html">Form Validation</a></li>
    320. 

  320. <li class="toctree-l2"><a class="reference internal" href="ftp.html">FTP Class</a></li>
    321. 

  321. <li class="toctree-l2"><a class="reference internal" href="image_lib.html">Image Manipulation Class</a></li>
    322. 

  322. <li class="toctree-l2"><a class="reference internal" href="input.html">Input Class</a></li>
    323. 

  323. <li class="toctree-l2"><a class="reference internal" href="javascript.html">Javascript Class</a></li>
    324. 

  324. <li class="toctree-l2"><a class="reference internal" href="language.html">Language Class</a></li>
    325. 

  325. <li class="toctree-l2"><a class="reference internal" href="loader.html">Loader Class</a></li>
    326. 

  326. <li class="toctree-l2"><a class="reference internal" href="migration.html">Migrations Class</a></li>
    327. 

  327. <li class="toctree-l2"><a class="reference internal" href="output.html">Output Class</a></li>
    328. 

  328. <li class="toctree-l2"><a class="reference internal" href="pagination.html">Pagination Class</a></li>
    329. 

  329. <li class="toctree-l2"><a class="reference internal" href="parser.html">Template Parser Class</a></li>
    330. 

  330. <li class="toctree-l2"><a class="reference internal" href="security.html">Security Class</a></li>
    331. 

  331. <li class="toctree-l2"><a class="reference internal" href="sessions.html">Session Library</a></li>
    332. 

  332. <li class="toctree-l2"><a class="reference internal" href="table.html">HTML Table Class</a></li>
    333. 

  333. <li class="toctree-l2"><a class="reference internal" href="trackback.html">Trackback Class</a></li>
    334. 

  334. <li class="toctree-l2"><a class="reference internal" href="typography.html">Typography Class</a></li>
    335. 

  335. <li class="toctree-l2"><a class="reference internal" href="unit_testing.html">Unit Testing Class</a></li>
    336. 

  336. <li class="toctree-l2 current"><a class="current reference internal" href="#">URI Class</a></li>
    337. 

  337. <li class="toctree-l2"><a class="reference internal" href="user_agent.html">User Agent Class</a></li>
    338. 

  338. <li class="toctree-l2"><a class="reference internal" href="xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
    339. 

  339. <li class="toctree-l2"><a class="reference internal" href="zip.html">Zip Encoding Class</a></li>
    340. 

  340. </ul>
    341. 

  341. </li>
    342. 

  342. </ul>
    343. 

  343. <ul>
    344. 

  344. <li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul>
    345. 

  345. <li class="toctree-l2"><a class="reference internal" href="../database/examples.html">Quick Start: Usage Examples</a></li>
    346. 

  346. <li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li>
    347. 

  347. <li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li>
    348. 

  348. <li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li>
    349. 

  349. <li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li>
    350. 

  350. <li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li>
    351. 

  351. <li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li>
    352. 

  352. <li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li>
    353. 

  353. <li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li>
    354. 

  354. <li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li>
    355. 

  355. <li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li>
    356. 

  356. <li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li>
    357. 

  357. <li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li>
    358. 

  358. <li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li>
    359. 

  359. </ul>
    360. 

  360. </li>
    361. 

  361. </ul>
    362. 

  362. <ul>
    363. 

  363. <li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
    364. 

  364. <li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
    365. 

  365. <li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
    366. 

  366. <li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
    367. 

  367. <li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
    368. 

  368. <li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
    369. 

  369. <li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
    370. 

  370. <li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
    371. 

  371. <li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
    372. 

  372. <li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
    373. 

  373. <li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
    374. 

  374. <li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
    375. 

  375. <li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
    376. 

  376. <li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
    377. 

  377. <li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
    378. 

  378. <li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
    379. 

  379. <li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
    380. 

  380. <li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
    381. 

  381. <li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
    382. 

  382. <li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
    383. 

  383. <li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
    384. 

  384. <li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
    385. 

  385. </ul>
    386. 

  386. </li>
    387. 

  387. </ul>
    388. 

  388. 

  389.           
    390. 

  390.         
    391. 

  391.       </div>
    392. 

  392.       &nbsp;
    393. 

  393.     </nav>
    394. 

  394. 

  395.     <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
    396. 

  396. 

  397.       
    398. 

  398.       <nav class="wy-nav-top" role="navigation" aria-label="top navigation">
    399. 

  399.         <i data-toggle="wy-nav-top" class="fa fa-bars"></i>
    400. 

  400.         <a href="../index.html">CodeIgniter</a>
    401. 

  401.       </nav>
    402. 

  402. 

  403. 

  404.       
    405. 

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    406. 

  406.         <div class="rst-content">
    407. 

  407.           <div role="navigation" aria-label="breadcrumbs navigation">
    408. 

  408.   <ul class="wy-breadcrumbs">
    409. 

  409.     <li><a href="../index.html">Docs</a> &raquo;</li>
    410. 

  410.       
    411. 

  411.         <li><a href="index.html">Libraries</a> &raquo;</li>
    412. 

  412.       
    413. 

  413.     <li>URI Class</li>
    414. 

  414.     <li class="wy-breadcrumbs-aside">
    415. 

  415.       
    416. 

  416.     </li>
    417. 

  417.     <div style="float:right;margin-left:5px;" id="closeMe">
    418. 

  418.       <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" />
    419. 

  419.     </div>
    420. 

  420.   </ul>
    421. 

  421.   <hr/>
    422. 

  422. </div>
    423. 

  423.           <div role="main" class="document">
    424. 

  424.             
    425. 

  425.   <div class="section" id="uri-class">
    426. 

  426. <h1>URI Class<a class="headerlink" href="#uri-class" title="Permalink to this headline">¶</a></h1>
    427. 

  427. <p>The URI Class provides methods that help you retrieve information from
    428. 

  428. your URI strings. If you use URI routing, you can also retrieve
    429. 

  429. information about the re-routed segments.</p>
    430. 

  430. <div class="admonition note">
    431. 

  431. <p class="first admonition-title">Note</p>
    432. 

  432. <p class="last">This class is initialized automatically by the system so there
    433. 

  433. is no need to do it manually.</p>
    434. 

  434. </div>
    435. 

  435. <div class="contents local topic" id="contents">
    436. 

  436. <ul class="simple">
    437. 

  437. <li><a class="reference internal" href="#class-reference" id="id1">Class Reference</a></li>
    438. 

  438. </ul>
    439. 

  439. </div>
    440. 

  440. <div class="custom-index container"></div><div class="section" id="class-reference">
    441. 

  441. <h2><a class="toc-backref" href="#id1">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2>
    442. 

  442. <dl class="class">
    443. 

  443. <dt id="CI_URI">
    444. 

  444. <em class="property">class </em><code class="descname">CI_URI</code><a class="headerlink" href="#CI_URI" title="Permalink to this definition">¶</a></dt>
    445. 

  445. <dd><dl class="method">
    446. 

  446. <dt id="CI_URI::segment">
    447. 

  447. <code class="descname">segment</code><span class="sig-paren">(</span><em>$n</em><span class="optional">[</span>, <em>$no_result = NULL</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::segment" title="Permalink to this definition">¶</a></dt>
    448. 

  448. <dd><table class="docutils field-list" frame="void" rules="none">
    449. 

  449. <col class="field-name" />
    450. 

  450. <col class="field-body" />
    451. 

  451. <tbody valign="top">
    452. 

  452. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
    453. 

  453. <li><strong>$n</strong> (<em>int</em>) – Segment index number</li>
    454. 

  454. <li><strong>$no_result</strong> (<em>mixed</em>) – What to return if the searched segment is not found</li>
    455. 

  455. </ul>
    456. 

  456. </td>
    457. 

  457. </tr>
    458. 

  458. <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Segment value or $no_result value if not found</p>
    459. 

  459. </td>
    460. 

  460. </tr>
    461. 

  461. <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
    462. 

  462. </td>
    463. 

  463. </tr>
    464. 

  464. </tbody>
    465. 

  465. </table>
    466. 

  466. <p>Permits you to retrieve a specific segment. Where n is the segment
    467. 

  467. number you wish to retrieve. Segments are numbered from left to right.
    468. 

  468. For example, if your full URL is this:</p>
    469. 

  469. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">http</span><span class="o">://</span><span class="nx">example</span><span class="o">.</span><span class="nx">com</span><span class="o">/</span><span class="nx">index</span><span class="o">.</span><span class="nx">php</span><span class="o">/</span><span class="nx">news</span><span class="o">/</span><span class="nx">local</span><span class="o">/</span><span class="nx">metro</span><span class="o">/</span><span class="nx">crime_is_up</span>
    470. 

  470. </pre></div>
    471. 

  471. </div>
    472. 

  472. <p>The segment numbers would be this:</p>
    473. 

  473. <ol class="arabic simple">
    474. 

  474. <li>news</li>
    475. 

  475. <li>local</li>
    476. 

  476. <li>metro</li>
    477. 

  477. <li>crime_is_up</li>
    478. 

  478. </ol>
    479. 

  479. <p>The optional second parameter defaults to NULL and allows you to set the return value
    480. 

  480. of this method when the requested URI segment is missing.
    481. 

  481. For example, this would tell the method to return the number zero in the event of failure:</p>
    482. 

  482. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$product_id</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">uri</span><span class="o">-&gt;</span><span class="na">segment</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">0</span><span class="p">);</span>
    483. 

  483. </pre></div>
    484. 

  484. </div>
    485. 

  485. <p>It helps avoid having to write code like this:</p>
    486. 

  486. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">uri</span><span class="o">-&gt;</span><span class="na">segment</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span> <span class="o">===</span> <span class="k">FALSE</span><span class="p">)</span>
    487. 

  487. <span class="p">{</span>
    488. 

  488.         <span class="nv">$product_id</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
    489. 

  489. <span class="p">}</span>
    490. 

  490. <span class="k">else</span>
    491. 

  491. <span class="p">{</span>
    492. 

  492.         <span class="nv">$product_id</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">uri</span><span class="o">-&gt;</span><span class="na">segment</span><span class="p">(</span><span class="mi">3</span><span class="p">);</span>
    493. 

  493. <span class="p">}</span>
    494. 

  494. </pre></div>
    495. 

  495. </div>
    496. 

  496. </dd></dl>
    497. 

  497. 

  498. <dl class="method">
    499. 

  499. <dt id="CI_URI::rsegment">
    500. 

  500. <code class="descname">rsegment</code><span class="sig-paren">(</span><em>$n</em><span class="optional">[</span>, <em>$no_result = NULL</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::rsegment" title="Permalink to this definition">¶</a></dt>
    501. 

  501. <dd><table class="docutils field-list" frame="void" rules="none">
    502. 

  502. <col class="field-name" />
    503. 

  503. <col class="field-body" />
    504. 

  504. <tbody valign="top">
    505. 

  505. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
    506. 

  506. <li><strong>$n</strong> (<em>int</em>) – Segment index number</li>
    507. 

  507. <li><strong>$no_result</strong> (<em>mixed</em>) – What to return if the searched segment is not found</li>
    508. 

  508. </ul>
    509. 

  509. </td>
    510. 

  510. </tr>
    511. 

  511. <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Routed segment value or $no_result value if not found</p>
    512. 

  512. </td>
    513. 

  513. </tr>
    514. 

  514. <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
    515. 

  515. </td>
    516. 

  516. </tr>
    517. 

  517. </tbody>
    518. 

  518. </table>
    519. 

  519. <p>This method is identical to <code class="docutils literal"><span class="pre">segment()</span></code>, except that it lets you retrieve
    520. 

  520. a specific segment from your re-routed URI in the event you are
    521. 

  521. using CodeIgniter’s <a class="reference internal" href="../general/routing.html"><span class="doc">URI Routing</span></a> feature.</p>
    522. 

  522. </dd></dl>
    523. 

  523. 

  524. <dl class="method">
    525. 

  525. <dt id="CI_URI::slash_segment">
    526. 

  526. <code class="descname">slash_segment</code><span class="sig-paren">(</span><em>$n</em><span class="optional">[</span>, <em>$where = 'trailing'</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::slash_segment" title="Permalink to this definition">¶</a></dt>
    527. 

  527. <dd><table class="docutils field-list" frame="void" rules="none">
    528. 

  528. <col class="field-name" />
    529. 

  529. <col class="field-body" />
    530. 

  530. <tbody valign="top">
    531. 

  531. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
    532. 

  532. <li><strong>$n</strong> (<em>int</em>) – Segment index number</li>
    533. 

  533. <li><strong>$where</strong> (<em>string</em>) – Where to add the slash (‘trailing’ or ‘leading’)</li>
    534. 

  534. </ul>
    535. 

  535. </td>
    536. 

  536. </tr>
    537. 

  537. <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Segment value, prepended/suffixed with a forward slash, or a slash if not found</p>
    538. 

  538. </td>
    539. 

  539. </tr>
    540. 

  540. <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p>
    541. 

  541. </td>
    542. 

  542. </tr>
    543. 

  543. </tbody>
    544. 

  544. </table>
    545. 

  545. <p>This method is almost identical to <code class="docutils literal"><span class="pre">segment()</span></code>, except it
    546. 

  546. adds a trailing and/or leading slash based on the second parameter.
    547. 

  547. If the parameter is not used, a trailing slash added. Examples:</p>
    548. 

  548. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">uri</span><span class="o">-&gt;</span><span class="na">slash_segment</span><span class="p">(</span><span class="mi">3</span><span class="p">);</span>
    549. 

  549. <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">uri</span><span class="o">-&gt;</span><span class="na">slash_segment</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="s1">&#39;leading&#39;</span><span class="p">);</span>
    550. 

  550. <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">uri</span><span class="o">-&gt;</span><span class="na">slash_segment</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="s1">&#39;both&#39;</span><span class="p">);</span>
    551. 

  551. </pre></div>
    552. 

  552. </div>
    553. 

  553. <p>Returns:</p>
    554. 

  554. <ol class="arabic simple">
    555. 

  555. <li>segment/</li>
    556. 

  556. <li>/segment</li>
    557. 

  557. <li>/segment/</li>
    558. 

  558. </ol>
    559. 

  559. </dd></dl>
    560. 

  560. 

  561. <dl class="method">
    562. 

  562. <dt id="CI_URI::slash_rsegment">
    563. 

  563. <code class="descname">slash_rsegment</code><span class="sig-paren">(</span><em>$n</em><span class="optional">[</span>, <em>$where = 'trailing'</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::slash_rsegment" title="Permalink to this definition">¶</a></dt>
    564. 

  564. <dd><table class="docutils field-list" frame="void" rules="none">
    565. 

  565. <col class="field-name" />
    566. 

  566. <col class="field-body" />
    567. 

  567. <tbody valign="top">
    568. 

  568. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
    569. 

  569. <li><strong>$n</strong> (<em>int</em>) – Segment index number</li>
    570. 

  570. <li><strong>$where</strong> (<em>string</em>) – Where to add the slash (‘trailing’ or ‘leading’)</li>
    571. 

  571. </ul>
    572. 

  572. </td>
    573. 

  573. </tr>
    574. 

  574. <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Routed segment value, prepended/suffixed with a forward slash, or a slash if not found</p>
    575. 

  575. </td>
    576. 

  576. </tr>
    577. 

  577. <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p>
    578. 

  578. </td>
    579. 

  579. </tr>
    580. 

  580. </tbody>
    581. 

  581. </table>
    582. 

  582. <p>This method is identical to <code class="docutils literal"><span class="pre">slash_segment()</span></code>, except that it lets you
    583. 

  583. add slashes a specific segment from your re-routed URI in the event you
    584. 

  584. are using CodeIgniter’s <a class="reference internal" href="../general/routing.html"><span class="doc">URI Routing</span></a>
    585. 

  585. feature.</p>
    586. 

  586. </dd></dl>
    587. 

  587. 

  588. <dl class="method">
    589. 

  589. <dt id="CI_URI::uri_to_assoc">
    590. 

  590. <code class="descname">uri_to_assoc</code><span class="sig-paren">(</span><span class="optional">[</span><em>$n = 3</em><span class="optional">[</span>, <em>$default = array()</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::uri_to_assoc" title="Permalink to this definition">¶</a></dt>
    591. 

  591. <dd><table class="docutils field-list" frame="void" rules="none">
    592. 

  592. <col class="field-name" />
    593. 

  593. <col class="field-body" />
    594. 

  594. <tbody valign="top">
    595. 

  595. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
    596. 

  596. <li><strong>$n</strong> (<em>int</em>) – Segment index number</li>
    597. 

  597. <li><strong>$default</strong> (<em>array</em>) – Default values</li>
    598. 

  598. </ul>
    599. 

  599. </td>
    600. 

  600. </tr>
    601. 

  601. <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Associative URI segments array</p>
    602. 

  602. </td>
    603. 

  603. </tr>
    604. 

  604. <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p>
    605. 

  605. </td>
    606. 

  606. </tr>
    607. 

  607. </tbody>
    608. 

  608. </table>
    609. 

  609. <p>This method lets you turn URI segments into an associative array of
    610. 

  610. key/value pairs. Consider this URI:</p>
    611. 

  611. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">index</span><span class="o">.</span><span class="nx">php</span><span class="o">/</span><span class="nx">user</span><span class="o">/</span><span class="nx">search</span><span class="o">/</span><span class="nx">name</span><span class="o">/</span><span class="nx">joe</span><span class="o">/</span><span class="nx">location</span><span class="o">/</span><span class="nx">UK</span><span class="o">/</span><span class="nx">gender</span><span class="o">/</span><span class="nx">male</span>
    612. 

  612. </pre></div>
    613. 

  613. </div>
    614. 

  614. <p>Using this method you can turn the URI into an associative array with
    615. 

  615. this prototype:</p>
    616. 

  616. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="p">[</span><span class="k">array</span><span class="p">]</span>
    617. 

  617. <span class="p">(</span>
    618. 

  618.         <span class="s1">&#39;name&#39;</span>          <span class="o">=&gt;</span> <span class="s1">&#39;joe&#39;</span>
    619. 

  619.         <span class="s1">&#39;location&#39;</span>      <span class="o">=&gt;</span> <span class="s1">&#39;UK&#39;</span>
    620. 

  620.         <span class="s1">&#39;gender&#39;</span>        <span class="o">=&gt;</span> <span class="s1">&#39;male&#39;</span>
    621. 

  621. <span class="p">)</span>
    622. 

  622. </pre></div>
    623. 

  623. </div>
    624. 

  624. <p>The first parameter lets you set an offset, which defaults to 3 since your
    625. 

  625. URI will normally contain a controller/method pair in the first and second segments.
    626. 

  626. Example:</p>
    627. 

  627. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$array</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">uri</span><span class="o">-&gt;</span><span class="na">uri_to_assoc</span><span class="p">(</span><span class="mi">3</span><span class="p">);</span>
    628. 

  628. <span class="k">echo</span> <span class="nv">$array</span><span class="p">[</span><span class="s1">&#39;name&#39;</span><span class="p">];</span>
    629. 

  629. </pre></div>
    630. 

  630. </div>
    631. 

  631. <p>The second parameter lets you set default key names, so that the array
    632. 

  632. returned will always contain expected indexes, even if missing from the URI.
    633. 

  633. Example:</p>
    634. 

  634. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$default</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">&#39;name&#39;</span><span class="p">,</span> <span class="s1">&#39;gender&#39;</span><span class="p">,</span> <span class="s1">&#39;location&#39;</span><span class="p">,</span> <span class="s1">&#39;type&#39;</span><span class="p">,</span> <span class="s1">&#39;sort&#39;</span><span class="p">);</span>
    635. 

  635. <span class="nv">$array</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">uri</span><span class="o">-&gt;</span><span class="na">uri_to_assoc</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="nv">$default</span><span class="p">);</span>
    636. 

  636. </pre></div>
    637. 

  637. </div>
    638. 

  638. <p>If the URI does not contain a value in your default, an array index will
    639. 

  639. be set to that name, with a value of NULL.</p>
    640. 

  640. <p>Lastly, if a corresponding value is not found for a given key (if there
    641. 

  641. is an odd number of URI segments) the value will be set to NULL.</p>
    642. 

  642. </dd></dl>
    643. 

  643. 

  644. <dl class="method">
    645. 

  645. <dt id="CI_URI::ruri_to_assoc">
    646. 

  646. <code class="descname">ruri_to_assoc</code><span class="sig-paren">(</span><span class="optional">[</span><em>$n = 3</em><span class="optional">[</span>, <em>$default = array()</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::ruri_to_assoc" title="Permalink to this definition">¶</a></dt>
    647. 

  647. <dd><table class="docutils field-list" frame="void" rules="none">
    648. 

  648. <col class="field-name" />
    649. 

  649. <col class="field-body" />
    650. 

  650. <tbody valign="top">
    651. 

  651. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
    652. 

  652. <li><strong>$n</strong> (<em>int</em>) – Segment index number</li>
    653. 

  653. <li><strong>$default</strong> (<em>array</em>) – Default values</li>
    654. 

  654. </ul>
    655. 

  655. </td>
    656. 

  656. </tr>
    657. 

  657. <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Associative routed URI segments array</p>
    658. 

  658. </td>
    659. 

  659. </tr>
    660. 

  660. <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p>
    661. 

  661. </td>
    662. 

  662. </tr>
    663. 

  663. </tbody>
    664. 

  664. </table>
    665. 

  665. <p>This method is identical to <code class="docutils literal"><span class="pre">uri_to_assoc()</span></code>, except that it creates
    666. 

  666. an associative array using the re-routed URI in the event you are using
    667. 

  667. CodeIgniter’s <a class="reference internal" href="../general/routing.html"><span class="doc">URI Routing</span></a> feature.</p>
    668. 

  668. </dd></dl>
    669. 

  669. 

  670. <dl class="method">
    671. 

  671. <dt id="CI_URI::assoc_to_uri">
    672. 

  672. <code class="descname">assoc_to_uri</code><span class="sig-paren">(</span><em>$array</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::assoc_to_uri" title="Permalink to this definition">¶</a></dt>
    673. 

  673. <dd><table class="docutils field-list" frame="void" rules="none">
    674. 

  674. <col class="field-name" />
    675. 

  675. <col class="field-body" />
    676. 

  676. <tbody valign="top">
    677. 

  677. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
    678. 

  678. <li><strong>$array</strong> (<em>array</em>) – Input array of key/value pairs</li>
    679. 

  679. </ul>
    680. 

  680. </td>
    681. 

  681. </tr>
    682. 

  682. <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">URI string</p>
    683. 

  683. </td>
    684. 

  684. </tr>
    685. 

  685. <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p>
    686. 

  686. </td>
    687. 

  687. </tr>
    688. 

  688. </tbody>
    689. 

  689. </table>
    690. 

  690. <p>Takes an associative array as input and generates a URI string from it.
    691. 

  691. The array keys will be included in the string. Example:</p>
    692. 

  692. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$array</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">&#39;product&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;shoes&#39;</span><span class="p">,</span> <span class="s1">&#39;size&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;large&#39;</span><span class="p">,</span> <span class="s1">&#39;color&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;red&#39;</span><span class="p">);</span>
    693. 

  693. <span class="nv">$str</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">uri</span><span class="o">-&gt;</span><span class="na">assoc_to_uri</span><span class="p">(</span><span class="nv">$array</span><span class="p">);</span>
    694. 

  694. 

  695. <span class="c1">// Produces: product/shoes/size/large/color/red</span>
    696. 

  696. </pre></div>
    697. 

  697. </div>
    698. 

  698. </dd></dl>
    699. 

  699. 

  700. <dl class="method">
    701. 

  701. <dt id="CI_URI::uri_string">
    702. 

  702. <code class="descname">uri_string</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::uri_string" title="Permalink to this definition">¶</a></dt>
    703. 

  703. <dd><table class="docutils field-list" frame="void" rules="none">
    704. 

  704. <col class="field-name" />
    705. 

  705. <col class="field-body" />
    706. 

  706. <tbody valign="top">
    707. 

  707. <tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">URI string</td>
    708. 

  708. </tr>
    709. 

  709. <tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">string</td>
    710. 

  710. </tr>
    711. 

  711. </tbody>
    712. 

  712. </table>
    713. 

  713. <p>Returns a string with the complete URI. For example, if this is your full URL:</p>
    714. 

  714. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">http</span><span class="o">://</span><span class="nx">example</span><span class="o">.</span><span class="nx">com</span><span class="o">/</span><span class="nx">index</span><span class="o">.</span><span class="nx">php</span><span class="o">/</span><span class="nx">news</span><span class="o">/</span><span class="nx">local</span><span class="o">/</span><span class="mi">345</span>
    715. 

  715. </pre></div>
    716. 

  716. </div>
    717. 

  717. <p>The method would return this:</p>
    718. 

  718. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">news</span><span class="o">/</span><span class="nx">local</span><span class="o">/</span><span class="mi">345</span>
    719. 

  719. </pre></div>
    720. 

  720. </div>
    721. 

  721. </dd></dl>
    722. 

  722. 

  723. <dl class="method">
    724. 

  724. <dt id="CI_URI::ruri_string">
    725. 

  725. <code class="descname">ruri_string</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::ruri_string" title="Permalink to this definition">¶</a></dt>
    726. 

  726. <dd><table class="docutils field-list" frame="void" rules="none">
    727. 

  727. <col class="field-name" />
    728. 

  728. <col class="field-body" />
    729. 

  729. <tbody valign="top">
    730. 

  730. <tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Routed URI string</td>
    731. 

  731. </tr>
    732. 

  732. <tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">string</td>
    733. 

  733. </tr>
    734. 

  734. </tbody>
    735. 

  735. </table>
    736. 

  736. <p>This method is identical to <code class="docutils literal"><span class="pre">uri_string()</span></code>, except that it returns
    737. 

  737. the re-routed URI in the event you are using CodeIgniter’s <a class="reference internal" href="../general/routing.html"><span class="doc">URI
    738. 

  738. Routing</span></a> feature.</p>
    739. 

  739. </dd></dl>
    740. 

  740. 

  741. <dl class="method">
    742. 

  742. <dt id="CI_URI::total_segments">
    743. 

  743. <code class="descname">total_segments</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::total_segments" title="Permalink to this definition">¶</a></dt>
    744. 

  744. <dd><table class="docutils field-list" frame="void" rules="none">
    745. 

  745. <col class="field-name" />
    746. 

  746. <col class="field-body" />
    747. 

  747. <tbody valign="top">
    748. 

  748. <tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Count of URI segments</td>
    749. 

  749. </tr>
    750. 

  750. <tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">int</td>
    751. 

  751. </tr>
    752. 

  752. </tbody>
    753. 

  753. </table>
    754. 

  754. <p>Returns the total number of segments.</p>
    755. 

  755. </dd></dl>
    756. 

  756. 

  757. <dl class="method">
    758. 

  758. <dt id="CI_URI::total_rsegments">
    759. 

  759. <code class="descname">total_rsegments</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::total_rsegments" title="Permalink to this definition">¶</a></dt>
    760. 

  760. <dd><table class="docutils field-list" frame="void" rules="none">
    761. 

  761. <col class="field-name" />
    762. 

  762. <col class="field-body" />
    763. 

  763. <tbody valign="top">
    764. 

  764. <tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Count of routed URI segments</td>
    765. 

  765. </tr>
    766. 

  766. <tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">int</td>
    767. 

  767. </tr>
    768. 

  768. </tbody>
    769. 

  769. </table>
    770. 

  770. <p>This method is identical to <code class="docutils literal"><span class="pre">total_segments()</span></code>, except that it returns
    771. 

  771. the total number of segments in your re-routed URI in the event you are
    772. 

  772. using CodeIgniter’s <a class="reference internal" href="../general/routing.html"><span class="doc">URI Routing</span></a> feature.</p>
    773. 

  773. </dd></dl>
    774. 

  774. 

  775. <dl class="method">
    776. 

  776. <dt id="CI_URI::segment_array">
    777. 

  777. <code class="descname">segment_array</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::segment_array" title="Permalink to this definition">¶</a></dt>
    778. 

  778. <dd><table class="docutils field-list" frame="void" rules="none">
    779. 

  779. <col class="field-name" />
    780. 

  780. <col class="field-body" />
    781. 

  781. <tbody valign="top">
    782. 

  782. <tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">URI segments array</td>
    783. 

  783. </tr>
    784. 

  784. <tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">array</td>
    785. 

  785. </tr>
    786. 

  786. </tbody>
    787. 

  787. </table>
    788. 

  788. <p>Returns an array containing the URI segments. For example:</p>
    789. 

  789. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$segs</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">uri</span><span class="o">-&gt;</span><span class="na">segment_array</span><span class="p">();</span>
    790. 

  790. 

  791. <span class="k">foreach</span> <span class="p">(</span><span class="nv">$segs</span> <span class="k">as</span> <span class="nv">$segment</span><span class="p">)</span>
    792. 

  792. <span class="p">{</span>
    793. 

  793.         <span class="k">echo</span> <span class="nv">$segment</span><span class="p">;</span>
    794. 

  794.         <span class="k">echo</span> <span class="s1">&#39;&lt;br /&gt;&#39;</span><span class="p">;</span>
    795. 

  795. <span class="p">}</span>
    796. 

  796. </pre></div>
    797. 

  797. </div>
    798. 

  798. </dd></dl>
    799. 

  799. 

  800. <dl class="method">
    801. 

  801. <dt id="CI_URI::rsegment_array">
    802. 

  802. <code class="descname">rsegment_array</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_URI::rsegment_array" title="Permalink to this definition">¶</a></dt>
    803. 

  803. <dd><table class="docutils field-list" frame="void" rules="none">
    804. 

  804. <col class="field-name" />
    805. 

  805. <col class="field-body" />
    806. 

  806. <tbody valign="top">
    807. 

  807. <tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Routed URI segments array</td>
    808. 

  808. </tr>
    809. 

  809. <tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">array</td>
    810. 

  810. </tr>
    811. 

  811. </tbody>
    812. 

  812. </table>
    813. 

  813. <p>This method is identical to <code class="docutils literal"><span class="pre">segment_array()</span></code>, except that it returns
    814. 

  814. the array of segments in your re-routed URI in the event you are using
    815. 

  815. CodeIgniter’s <a class="reference internal" href="../general/routing.html"><span class="doc">URI Routing</span></a> feature.</p>
    816. 

  816. </dd></dl>
    817. 

  817. 

  818. </dd></dl>
    819. 

  819. 

  820. </div>
    821. 

  821. </div>
    822. 

  822. 

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  824.           </div>
    825. 

  825.           <footer>
    826. 

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    829. 

  829.         <a href="user_agent.html" class="btn btn-neutral float-right" title="User Agent Class">Next <span class="fa fa-arrow-circle-right"></span></a>
    830. 

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    838. 

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    840. 

  840.     <p>
    841. 

  841.         &copy; Copyright 2014 - 2019, British Columbia Institute of Technology.
    842. 

  842.       Last updated on Sep 19, 2019.
    843. 

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