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config.html

config.html 53 KB
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  1. 

  2. 

  3. <!DOCTYPE html>
    4. 

  4. <!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
    5. 

  5. <!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
    6. 

  6. <head>
    7. 

  7.   <meta charset="utf-8">
    8. 

  8.   <meta name="viewport" content="width=device-width, initial-scale=1.0">
    9. 

  9.   
    10. 

  10.   <title>Config Class &mdash; CodeIgniter 3.1.11 documentation</title>
    11. 

  11.   
    12. 

  12. 

  13.   
    14. 

  14.   
    15. 

  15.     <link rel="shortcut icon" href="../_static/ci-icon.ico"/>
    16. 

  16.   
    17. 

  17. 

  18.   
    19. 

  19.   <link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'>
    20. 

  20. 

  21.   
    22. 

  22.   
    23. 

  23.     
    24. 

  24. 

  25.   
    26. 

  26. 

  27.   
    28. 

  28.   
    29. 

  29.     <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" />
    30. 

  30.   
    31. 

  31. 

  32.   
    33. 

  33.         <link rel="index" title="Index"
    34. 

  34.               href="../genindex.html"/>
    35. 

  35.         <link rel="search" title="Search" href="../search.html"/>
    36. 

  36.     <link rel="top" title="CodeIgniter 3.1.11 documentation" href="../index.html"/>
    37. 

  37.         <link rel="up" title="Libraries" href="index.html"/>
    38. 

  38.         <link rel="next" title="Email Class" href="email.html"/>
    39. 

  39.         <link rel="prev" title="Shopping Cart Class" href="cart.html"/> 
    40. 

  40. 

  41.   
    42. 

  42.   <script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
    43. 

  43. 

  44. </head>
    45. 

  45. 

  46. <body class="wy-body-for-nav" role="document">
    47. 

  47. 

  48.   <div id="nav">
    49. 

  49.   <div id="nav_inner">
    50. 

  50.     
    51. 

  51.     
    52. 

  52.     
    53. 

  53.       <div id="pulldown-menu" class="ciNav">
    54. 

  54.         <ul>
    55. 

  55. <li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
    56. 

  56. </ul>
    57. 

  57. <ul>
    58. 

  58. <li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
    59. 

  59. <li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
    60. 

  60. <li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
    61. 

  61. <li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
    62. 

  62. <li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
    63. 

  63. </ul>
    64. 

  64. </li>
    65. 

  65. </ul>
    66. 

  66. <ul>
    67. 

  67. <li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
    68. 

  68. <li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
    69. 

  69. <li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
    70. 

  70. <li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
    71. 

  71. <li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
    72. 

  72. <li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
    73. 

  73. <li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
    74. 

  74. </ul>
    75. 

  75. </li>
    76. 

  76. </ul>
    77. 

  77. <ul>
    78. 

  78. <li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul>
    79. 

  79. <li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li>
    80. 

  80. <li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li>
    81. 

  81. <li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
    82. 

  82. <li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
    83. 

  83. </ul>
    84. 

  84. </li>
    85. 

  85. </ul>
    86. 

  86. <ul>
    87. 

  87. <li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
    88. 

  88. <li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
    89. 

  89. <li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
    90. 

  90. </ul>
    91. 

  91. </li>
    92. 

  92. </ul>
    93. 

  93. <ul>
    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 current"><a class="current reference internal" href="#">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"><a class="reference internal" href="uri.html">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" />
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  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 current"><a class="current reference internal" href="#">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"><a class="reference internal" href="uri.html">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. 

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    425. 

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

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

  427. <p>The Config class provides a means to retrieve configuration preferences.
    428. 

  428. These preferences can come from the default config file
    429. 

  429. (application/config/config.php) or from your own custom config files.</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="#working-with-the-config-class" id="id1">Working with the Config Class</a><ul>
    438. 

  438. <li><a class="reference internal" href="#anatomy-of-a-config-file" id="id2">Anatomy of a Config File</a></li>
    439. 

  439. <li><a class="reference internal" href="#loading-a-config-file" id="id3">Loading a Config File</a><ul>
    440. 

  440. <li><a class="reference internal" href="#manual-loading" id="id4">Manual Loading</a></li>
    441. 

  441. <li><a class="reference internal" href="#auto-loading" id="id5">Auto-loading</a></li>
    442. 

  442. </ul>
    443. 

  443. </li>
    444. 

  444. <li><a class="reference internal" href="#fetching-config-items" id="id6">Fetching Config Items</a></li>
    445. 

  445. <li><a class="reference internal" href="#setting-a-config-item" id="id7">Setting a Config Item</a></li>
    446. 

  446. <li><a class="reference internal" href="#environments" id="id8">Environments</a></li>
    447. 

  447. </ul>
    448. 

  448. </li>
    449. 

  449. <li><a class="reference internal" href="#class-reference" id="id9">Class Reference</a></li>
    450. 

  450. </ul>
    451. 

  451. </div>
    452. 

  452. <div class="custom-index container"></div><div class="section" id="working-with-the-config-class">
    453. 

  453. <h2><a class="toc-backref" href="#id1">Working with the Config Class</a><a class="headerlink" href="#working-with-the-config-class" title="Permalink to this headline">¶</a></h2>
    454. 

  454. <div class="section" id="anatomy-of-a-config-file">
    455. 

  455. <h3><a class="toc-backref" href="#id2">Anatomy of a Config File</a><a class="headerlink" href="#anatomy-of-a-config-file" title="Permalink to this headline">¶</a></h3>
    456. 

  456. <p>By default, CodeIgniter has one primary config file, located at
    457. 

  457. application/config/config.php. If you open the file using your text
    458. 

  458. editor you’ll see that config items are stored in an array called
    459. 

  459. $config.</p>
    460. 

  460. <p>You can add your own config items to this file, or if you prefer to keep
    461. 

  461. your configuration items separate (assuming you even need config items),
    462. 

  462. simply create your own file and save it in config folder.</p>
    463. 

  463. <div class="admonition note">
    464. 

  464. <p class="first admonition-title">Note</p>
    465. 

  465. <p class="last">If you do create your own config files use the same format as
    466. 

  466. the primary one, storing your items in an array called $config.
    467. 

  467. CodeIgniter will intelligently manage these files so there will be no
    468. 

  468. conflict even though the array has the same name (assuming an array
    469. 

  469. index is not named the same as another).</p>
    470. 

  470. </div>
    471. 

  471. </div>
    472. 

  472. <div class="section" id="loading-a-config-file">
    473. 

  473. <h3><a class="toc-backref" href="#id3">Loading a Config File</a><a class="headerlink" href="#loading-a-config-file" title="Permalink to this headline">¶</a></h3>
    474. 

  474. <div class="admonition note">
    475. 

  475. <p class="first admonition-title">Note</p>
    476. 

  476. <p class="last">CodeIgniter automatically loads the primary config file
    477. 

  477. (application/config/config.php), so you will only need to load a config
    478. 

  478. file if you have created your own.</p>
    479. 

  479. </div>
    480. 

  480. <p>There are two ways to load a config file:</p>
    481. 

  481. <div class="section" id="manual-loading">
    482. 

  482. <h4><a class="toc-backref" href="#id4">Manual Loading</a><a class="headerlink" href="#manual-loading" title="Permalink to this headline">¶</a></h4>
    483. 

  483. <p>To load one of your custom config files you will use the following
    484. 

  484. function within the <a class="reference internal" href="../general/controllers.html"><span class="doc">controller</span></a> that
    485. 

  485. needs it:</p>
    486. 

  486. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">load</span><span class="p">(</span><span class="s1">&#39;filename&#39;</span><span class="p">);</span>
    487. 

  487. </pre></div>
    488. 

  488. </div>
    489. 

  489. <p>Where filename is the name of your config file, without the .php file
    490. 

  490. extension.</p>
    491. 

  491. <p>If you need to load multiple config files normally they will be
    492. 

  492. merged into one master config array. Name collisions can occur,
    493. 

  493. however, if you have identically named array indexes in different
    494. 

  494. config files. To avoid collisions you can set the second parameter to
    495. 

  495. TRUE and each config file will be stored in an array index
    496. 

  496. corresponding to the name of the config file. Example:</p>
    497. 

  497. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// Stored in an array with this prototype: $this-&gt;config[&#39;blog_settings&#39;] = $config</span>
    498. 

  498. <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">load</span><span class="p">(</span><span class="s1">&#39;blog_settings&#39;</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
    499. 

  499. </pre></div>
    500. 

  500. </div>
    501. 

  501. <p>Please see the section entitled Fetching Config Items below to learn
    502. 

  502. how to retrieve config items set this way.</p>
    503. 

  503. <p>The third parameter allows you to suppress errors in the event that a
    504. 

  504. config file does not exist:</p>
    505. 

  505. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">load</span><span class="p">(</span><span class="s1">&#39;blog_settings&#39;</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
    506. 

  506. </pre></div>
    507. 

  507. </div>
    508. 

  508. </div>
    509. 

  509. <div class="section" id="auto-loading">
    510. 

  510. <h4><a class="toc-backref" href="#id5">Auto-loading</a><a class="headerlink" href="#auto-loading" title="Permalink to this headline">¶</a></h4>
    511. 

  511. <p>If you find that you need a particular config file globally, you can
    512. 

  512. have it loaded automatically by the system. To do this, open the
    513. 

  513. <strong>autoload.php</strong> file, located at application/config/autoload.php,
    514. 

  514. and add your config file as indicated in the file.</p>
    515. 

  515. </div>
    516. 

  516. </div>
    517. 

  517. <div class="section" id="fetching-config-items">
    518. 

  518. <h3><a class="toc-backref" href="#id6">Fetching Config Items</a><a class="headerlink" href="#fetching-config-items" title="Permalink to this headline">¶</a></h3>
    519. 

  519. <p>To retrieve an item from your config file, use the following function:</p>
    520. 

  520. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">item</span><span class="p">(</span><span class="s1">&#39;item_name&#39;</span><span class="p">);</span>
    521. 

  521. </pre></div>
    522. 

  522. </div>
    523. 

  523. <p>Where item_name is the $config array index you want to retrieve. For
    524. 

  524. example, to fetch your language choice you’ll do this:</p>
    525. 

  525. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$lang</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">item</span><span class="p">(</span><span class="s1">&#39;language&#39;</span><span class="p">);</span>
    526. 

  526. </pre></div>
    527. 

  527. </div>
    528. 

  528. <p>The function returns NULL if the item you are trying to fetch
    529. 

  529. does not exist.</p>
    530. 

  530. <p>If you are using the second parameter of the $this-&gt;config-&gt;load
    531. 

  531. function in order to assign your config items to a specific index you
    532. 

  532. can retrieve it by specifying the index name in the second parameter of
    533. 

  533. the $this-&gt;config-&gt;item() function. Example:</p>
    534. 

  534. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// Loads a config file named blog_settings.php and assigns it to an index named &quot;blog_settings&quot;</span>
    535. 

  535. <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">load</span><span class="p">(</span><span class="s1">&#39;blog_settings&#39;</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
    536. 

  536. 

  537. <span class="c1">// Retrieve a config item named site_name contained within the blog_settings array</span>
    538. 

  538. <span class="nv">$site_name</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">item</span><span class="p">(</span><span class="s1">&#39;site_name&#39;</span><span class="p">,</span> <span class="s1">&#39;blog_settings&#39;</span><span class="p">);</span>
    539. 

  539. 

  540. <span class="c1">// An alternate way to specify the same item:</span>
    541. 

  541. <span class="nv">$blog_config</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">item</span><span class="p">(</span><span class="s1">&#39;blog_settings&#39;</span><span class="p">);</span>
    542. 

  542. <span class="nv">$site_name</span> <span class="o">=</span> <span class="nv">$blog_config</span><span class="p">[</span><span class="s1">&#39;site_name&#39;</span><span class="p">];</span>
    543. 

  543. </pre></div>
    544. 

  544. </div>
    545. 

  545. </div>
    546. 

  546. <div class="section" id="setting-a-config-item">
    547. 

  547. <h3><a class="toc-backref" href="#id7">Setting a Config Item</a><a class="headerlink" href="#setting-a-config-item" title="Permalink to this headline">¶</a></h3>
    548. 

  548. <p>If you would like to dynamically set a config item or change an existing
    549. 

  549. one, you can do so using:</p>
    550. 

  550. <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">set_item</span><span class="p">(</span><span class="s1">&#39;item_name&#39;</span><span class="p">,</span> <span class="s1">&#39;item_value&#39;</span><span class="p">);</span>
    551. 

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

  552. </div>
    553. 

  553. <p>Where item_name is the $config array index you want to change, and
    554. 

  554. item_value is its value.</p>
    555. 

  555. </div>
    556. 

  556. <div class="section" id="environments">
    557. 

  557. <span id="config-environments"></span><h3><a class="toc-backref" href="#id8">Environments</a><a class="headerlink" href="#environments" title="Permalink to this headline">¶</a></h3>
    558. 

  558. <p>You may load different configuration files depending on the current
    559. 

  559. environment. The ENVIRONMENT constant is defined in index.php, and is
    560. 

  560. described in detail in the <a class="reference internal" href="../general/environments.html"><span class="doc">Handling
    561. 

  561. Environments</span></a> section.</p>
    562. 

  562. <p>To create an environment-specific configuration file, create or copy a
    563. 

  563. configuration file in application/config/{ENVIRONMENT}/{FILENAME}.php</p>
    564. 

  564. <p>For example, to create a production-only config.php, you would:</p>
    565. 

  565. <ol class="arabic simple">
    566. 

  566. <li>Create the directory application/config/production/</li>
    567. 

  567. <li>Copy your existing config.php into the above directory</li>
    568. 

  568. <li>Edit application/config/production/config.php so it contains your
    569. 

  569. production settings</li>
    570. 

  570. </ol>
    571. 

  571. <p>When you set the ENVIRONMENT constant to ‘production’, the settings for
    572. 

  572. your new production-only config.php will be loaded.</p>
    573. 

  573. <p>You can place the following configuration files in environment-specific
    574. 

  574. folders:</p>
    575. 

  575. <ul class="simple">
    576. 

  576. <li>Default CodeIgniter configuration files</li>
    577. 

  577. <li>Your own custom configuration files</li>
    578. 

  578. </ul>
    579. 

  579. <div class="admonition note">
    580. 

  580. <p class="first admonition-title">Note</p>
    581. 

  581. <p class="last">CodeIgniter always loads the global config file first (i.e., the one in application/config/),
    582. 

  582. then tries to load the configuration files for the current environment.
    583. 

  583. This means you are not obligated to place <strong>all</strong> of your configuration files in an
    584. 

  584. environment folder. Only the files that change per environment. Additionally you don’t
    585. 

  585. have to copy <strong>all</strong> the config items in the environment config file. Only the config items
    586. 

  586. that you wish to change for your environment. The config items declared in your environment
    587. 

  587. folders always overwrite those in your global config files.</p>
    588. 

  588. </div>
    589. 

  589. </div>
    590. 

  590. </div>
    591. 

  591. <div class="section" id="class-reference">
    592. 

  592. <h2><a class="toc-backref" href="#id9">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2>
    593. 

  593. <dl class="class">
    594. 

  594. <dt id="CI_Config">
    595. 

  595. <em class="property">class </em><code class="descname">CI_Config</code><a class="headerlink" href="#CI_Config" title="Permalink to this definition">¶</a></dt>
    596. 

  596. <dd><dl class="attribute">
    597. 

  597. <dt>
    598. 

  598. <code class="descname">$config</code></dt>
    599. 

  599. <dd><p>Array of all loaded config values</p>
    600. 

  600. </dd></dl>
    601. 

  601. 

  602. <dl class="attribute">
    603. 

  603. <dt>
    604. 

  604. <code class="descname">$is_loaded</code></dt>
    605. 

  605. <dd><p>Array of all loaded config files</p>
    606. 

  606. </dd></dl>
    607. 

  607. 

  608. <dl class="method">
    609. 

  609. <dt id="CI_Config::item">
    610. 

  610. <code class="descname">item</code><span class="sig-paren">(</span><em>$item</em><span class="optional">[</span>, <em>$index=''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::item" title="Permalink to this definition">¶</a></dt>
    611. 

  611. <dd><table class="docutils field-list" frame="void" rules="none">
    612. 

  612. <col class="field-name" />
    613. 

  613. <col class="field-body" />
    614. 

  614. <tbody valign="top">
    615. 

  615. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
    616. 

  616. <li><strong>$item</strong> (<em>string</em>) – Config item name</li>
    617. 

  617. <li><strong>$index</strong> (<em>string</em>) – Index name</li>
    618. 

  618. </ul>
    619. 

  619. </td>
    620. 

  620. </tr>
    621. 

  621. <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Config item value or NULL if not found</p>
    622. 

  622. </td>
    623. 

  623. </tr>
    624. 

  624. <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
    625. 

  625. </td>
    626. 

  626. </tr>
    627. 

  627. </tbody>
    628. 

  628. </table>
    629. 

  629. <p>Fetch a config file item.</p>
    630. 

  630. </dd></dl>
    631. 

  631. 

  632. <dl class="method">
    633. 

  633. <dt id="CI_Config::set_item">
    634. 

  634. <code class="descname">set_item</code><span class="sig-paren">(</span><em>$item</em>, <em>$value</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::set_item" title="Permalink to this definition">¶</a></dt>
    635. 

  635. <dd><table class="docutils field-list" frame="void" rules="none">
    636. 

  636. <col class="field-name" />
    637. 

  637. <col class="field-body" />
    638. 

  638. <tbody valign="top">
    639. 

  639. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
    640. 

  640. <li><strong>$item</strong> (<em>string</em>) – Config item name</li>
    641. 

  641. <li><strong>$value</strong> (<em>string</em>) – Config item value</li>
    642. 

  642. </ul>
    643. 

  643. </td>
    644. 

  644. </tr>
    645. 

  645. <tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">void</p>
    646. 

  646. </td>
    647. 

  647. </tr>
    648. 

  648. </tbody>
    649. 

  649. </table>
    650. 

  650. <p>Sets a config file item to the specified value.</p>
    651. 

  651. </dd></dl>
    652. 

  652. 

  653. <dl class="method">
    654. 

  654. <dt id="CI_Config::slash_item">
    655. 

  655. <code class="descname">slash_item</code><span class="sig-paren">(</span><em>$item</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::slash_item" title="Permalink to this definition">¶</a></dt>
    656. 

  656. <dd><table class="docutils field-list" frame="void" rules="none">
    657. 

  657. <col class="field-name" />
    658. 

  658. <col class="field-body" />
    659. 

  659. <tbody valign="top">
    660. 

  660. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
    661. 

  661. <li><strong>$item</strong> (<em>string</em>) – config item name</li>
    662. 

  662. </ul>
    663. 

  663. </td>
    664. 

  664. </tr>
    665. 

  665. <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Config item value with a trailing forward slash or NULL if not found</p>
    666. 

  666. </td>
    667. 

  667. </tr>
    668. 

  668. <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
    669. 

  669. </td>
    670. 

  670. </tr>
    671. 

  671. </tbody>
    672. 

  672. </table>
    673. 

  673. <p>This method is identical to <code class="docutils literal"><span class="pre">item()</span></code>, except it appends a forward
    674. 

  674. slash to the end of the item, if it exists.</p>
    675. 

  675. </dd></dl>
    676. 

  676. 

  677. <dl class="method">
    678. 

  678. <dt id="CI_Config::load">
    679. 

  679. <code class="descname">load</code><span class="sig-paren">(</span><span class="optional">[</span><em>$file = ''</em><span class="optional">[</span>, <em>$use_sections = FALSE</em><span class="optional">[</span>, <em>$fail_gracefully = FALSE</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::load" title="Permalink to this definition">¶</a></dt>
    680. 

  680. <dd><table class="docutils field-list" frame="void" rules="none">
    681. 

  681. <col class="field-name" />
    682. 

  682. <col class="field-body" />
    683. 

  683. <tbody valign="top">
    684. 

  684. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
    685. 

  685. <li><strong>$file</strong> (<em>string</em>) – Configuration file name</li>
    686. 

  686. <li><strong>$use_sections</strong> (<em>bool</em>) – Whether config values should be loaded into their own section (index of the main config array)</li>
    687. 

  687. <li><strong>$fail_gracefully</strong> (<em>bool</em>) – Whether to return FALSE or to display an error message</li>
    688. 

  688. </ul>
    689. 

  689. </td>
    690. 

  690. </tr>
    691. 

  691. <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p>
    692. 

  692. </td>
    693. 

  693. </tr>
    694. 

  694. <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p>
    695. 

  695. </td>
    696. 

  696. </tr>
    697. 

  697. </tbody>
    698. 

  698. </table>
    699. 

  699. <p>Loads a configuration file.</p>
    700. 

  700. </dd></dl>
    701. 

  701. 

  702. <dl class="method">
    703. 

  703. <dt id="CI_Config::site_url">
    704. 

  704. <code class="descname">site_url</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::site_url" title="Permalink to this definition">¶</a></dt>
    705. 

  705. <dd><table class="docutils field-list" frame="void" rules="none">
    706. 

  706. <col class="field-name" />
    707. 

  707. <col class="field-body" />
    708. 

  708. <tbody valign="top">
    709. 

  709. <tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Site URL</td>
    710. 

  710. </tr>
    711. 

  711. <tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">string</td>
    712. 

  712. </tr>
    713. 

  713. </tbody>
    714. 

  714. </table>
    715. 

  715. <p>This method retrieves the URL to your site, along with the “index” value
    716. 

  716. you’ve specified in the config file.</p>
    717. 

  717. <p>This method is normally accessed via the corresponding functions in the
    718. 

  718. <a class="reference internal" href="../helpers/url_helper.html"><span class="doc">URL Helper</span></a>.</p>
    719. 

  719. </dd></dl>
    720. 

  720. 

  721. <dl class="method">
    722. 

  722. <dt id="CI_Config::base_url">
    723. 

  723. <code class="descname">base_url</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::base_url" title="Permalink to this definition">¶</a></dt>
    724. 

  724. <dd><table class="docutils field-list" frame="void" rules="none">
    725. 

  725. <col class="field-name" />
    726. 

  726. <col class="field-body" />
    727. 

  727. <tbody valign="top">
    728. 

  728. <tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Base URL</td>
    729. 

  729. </tr>
    730. 

  730. <tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">string</td>
    731. 

  731. </tr>
    732. 

  732. </tbody>
    733. 

  733. </table>
    734. 

  734. <p>This method retrieves the URL to your site, plus an optional path such
    735. 

  735. as to a stylesheet or image.</p>
    736. 

  736. <p>This method is normally accessed via the corresponding functions in the
    737. 

  737. <a class="reference internal" href="../helpers/url_helper.html"><span class="doc">URL Helper</span></a>.</p>
    738. 

  738. </dd></dl>
    739. 

  739. 

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

  741. <dt id="CI_Config::system_url">
    742. 

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

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

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

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

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

  747. <tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">URL pointing at your CI system/ directory</td>
    748. 

  748. </tr>
    749. 

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

  750. </tr>
    751. 

  751. </tbody>
    752. 

  752. </table>
    753. 

  753. <p>This method retrieves the URL to your CodeIgniter system/ directory.</p>
    754. 

  754. <div class="admonition note">
    755. 

  755. <p class="first admonition-title">Note</p>
    756. 

  756. <p class="last">This method is DEPRECATED because it encourages usage of
    757. 

  757. insecure coding practices. Your <em>system/</em> directory shouldn’t
    758. 

  758. be publicly accessible.</p>
    759. 

  759. </div>
    760. 

  760. </dd></dl>
    761. 

  761. 

  762. </dd></dl>
    763. 

  763. 

  764. </div>
    765. 

  765. </div>
    766. 

  766. 

  767. 

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    770. 

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    778. 

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    780. 

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  781.   <hr/>
    782. 

  782. 

  783.   <div role="contentinfo">
    784. 

  784.     <p>
    785. 

  785.         &copy; Copyright 2014 - 2019, British Columbia Institute of Technology.
    786. 

  786.       Last updated on Sep 19, 2019.
    787. 

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  796.     </section>
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    805. 

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    806. 

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