?
Current Path : /home1/savoy/www/savoyeducation.com/user_guide/overview/ |
Linux gator3171.hostgator.com 4.19.286-203.ELK.el7.x86_64 #1 SMP Wed Jun 14 04:33:55 CDT 2023 x86_64 |
Current File : /home1/savoy/www/savoyeducation.com/user_guide/overview/at_a_glance.html |
<!DOCTYPE html> <!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> <!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>CodeIgniter at a Glance — CodeIgniter 3.0.6 documentation</title> <link rel="shortcut icon" href="../_static/ci-icon.ico"/> <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'> <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" /> <link rel="top" title="CodeIgniter 3.0.6 documentation" href="../index.html"/> <link rel="up" title="CodeIgniter Overview" href="index.html"/> <link rel="next" title="CodeIgniter Features" href="features.html"/> <link rel="prev" title="Getting Started With CodeIgniter" href="getting_started.html"/> <script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script> </head> <body class="wy-body-for-nav" role="document"> <div id="nav"> <div id="nav_inner"> <div id="pulldown-menu" class="ciNav"> <ul> <li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a><ul class="simple"> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul> <li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li> <li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li> <li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li> <li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li> </ul> </li> </ul> <ul class="current"> <li class="toctree-l1 current"><a class="reference internal" href="index.html">CodeIgniter Overview</a><ul class="current"> <li class="toctree-l2"><a class="reference internal" href="getting_started.html">Getting Started</a></li> <li class="toctree-l2 current"><a class="current reference internal" href="">CodeIgniter at a Glance</a></li> <li class="toctree-l2"><a class="reference internal" href="features.html">Supported Features</a></li> <li class="toctree-l2"><a class="reference internal" href="appflow.html">Application Flow Chart</a></li> <li class="toctree-l2"><a class="reference internal" href="mvc.html">Model-View-Controller</a></li> <li class="toctree-l2"><a class="reference internal" href="goals.html">Architectural Goals</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul> <li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li> <li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li> <li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li> <li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul> <li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li> <li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul> <li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul> <li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul> <li class="toctree-l2"><a class="reference internal" href="../database/examples.html">Quick Start: Usage Examples</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul> <li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li> </ul> </li> </ul> </div> </div> </div> <div id="nav2"> <a href="#" id="openToc"> <img src="data:image/jpeg;base64,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" title="Toggle Table of Contents" alt="Toggle Table of Contents" /> </a> </div> <div class="wy-grid-for-nav"> <nav data-toggle="wy-nav-shift" class="wy-nav-side"> <div class="wy-side-nav-search"> <a href="../index.html" class="fa fa-home"> CodeIgniter</a> <div role="search"> <form id="rtd-search-form" class="wy-form" action="../search.html" method="get"> <input type="text" name="q" placeholder="Search docs" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> </div> <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation"> <ul> <li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a><ul class="simple"> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul> <li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li> <li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li> <li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li> <li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li> </ul> </li> </ul> <ul class="current"> <li class="toctree-l1 current"><a class="reference internal" href="index.html">CodeIgniter Overview</a><ul class="current"> <li class="toctree-l2"><a class="reference internal" href="getting_started.html">Getting Started</a></li> <li class="toctree-l2 current"><a class="current reference internal" href="">CodeIgniter at a Glance</a></li> <li class="toctree-l2"><a class="reference internal" href="features.html">Supported Features</a></li> <li class="toctree-l2"><a class="reference internal" href="appflow.html">Application Flow Chart</a></li> <li class="toctree-l2"><a class="reference internal" href="mvc.html">Model-View-Controller</a></li> <li class="toctree-l2"><a class="reference internal" href="goals.html">Architectural Goals</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul> <li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li> <li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li> <li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li> <li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul> <li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li> <li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul> <li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li> <li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul> <li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li> <li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul> <li class="toctree-l2"><a class="reference internal" href="../database/examples.html">Quick Start: Usage Examples</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li> <li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li> </ul> </li> </ul> <ul> <li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul> <li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li> <li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li> </ul> </li> </ul> </div> </nav> <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> <nav class="wy-nav-top" role="navigation" aria-label="top navigation"> <i data-toggle="wy-nav-top" class="fa fa-bars"></i> <a href="../index.html">CodeIgniter</a> </nav> <div class="wy-nav-content"> <div class="rst-content"> <div role="navigation" aria-label="breadcrumbs navigation"> <ul class="wy-breadcrumbs"> <li><a href="../index.html">Docs</a> »</li> <li><a href="index.html">CodeIgniter Overview</a> »</li> <li>CodeIgniter at a Glance</li> <li class="wy-breadcrumbs-aside"> </li> <div style="float:right;margin-left:5px;" id="closeMe"> <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" /> </div> </ul> <hr/> </div> <div role="main" class="document"> <div class="section" id="codeigniter-at-a-glance"> <h1>CodeIgniter at a Glance<a class="headerlink" href="#codeigniter-at-a-glance" title="Permalink to this headline">¶</a></h1> <div class="section" id="codeigniter-is-an-application-framework"> <h2>CodeIgniter is an Application Framework<a class="headerlink" href="#codeigniter-is-an-application-framework" title="Permalink to this headline">¶</a></h2> <p>CodeIgniter is a toolkit for people who build web applications using PHP. Its goal is to enable you to develop projects much faster than you could if you were writing code from scratch, by providing a rich set of libraries for commonly needed tasks, as well as a simple interface and logical structure to access these libraries. CodeIgniter lets you creatively focus on your project by minimizing the amount of code needed for a given task.</p> </div> <div class="section" id="codeigniter-is-free"> <h2>CodeIgniter is Free<a class="headerlink" href="#codeigniter-is-free" title="Permalink to this headline">¶</a></h2> <p>CodeIgniter is licensed under the MIT license so you can use it however you please. For more information please read the <a class="reference internal" href="../license.html"><em>license agreement</em></a>.</p> </div> <div class="section" id="codeigniter-is-light-weight"> <h2>CodeIgniter is Light Weight<a class="headerlink" href="#codeigniter-is-light-weight" title="Permalink to this headline">¶</a></h2> <p>Truly light weight. The core system requires only a few very small libraries. This is in stark contrast to many frameworks that require significantly more resources. Additional libraries are loaded dynamically upon request, based on your needs for a given process, so the base system is very lean and quite fast.</p> </div> <div class="section" id="codeigniter-is-fast"> <h2>CodeIgniter is Fast<a class="headerlink" href="#codeigniter-is-fast" title="Permalink to this headline">¶</a></h2> <p>Really fast. We challenge you to find a framework that has better performance than CodeIgniter.</p> </div> <div class="section" id="codeigniter-uses-m-v-c"> <h2>CodeIgniter Uses M-V-C<a class="headerlink" href="#codeigniter-uses-m-v-c" title="Permalink to this headline">¶</a></h2> <p>CodeIgniter uses the Model-View-Controller approach, which allows great separation between logic and presentation. This is particularly good for projects in which designers are working with your template files, as the code these files contain will be minimized. We describe MVC in more detail on its own page.</p> </div> <div class="section" id="codeigniter-generates-clean-urls"> <h2>CodeIgniter Generates Clean URLs<a class="headerlink" href="#codeigniter-generates-clean-urls" title="Permalink to this headline">¶</a></h2> <p>The URLs generated by CodeIgniter are clean and search-engine friendly. Rather than using the standard “query string” approach to URLs that is synonymous with dynamic systems, CodeIgniter uses a segment-based approach:</p> <div class="highlight-ci"><div class="highlight"><pre><span class="nx">example</span><span class="o">.</span><span class="nx">com</span><span class="o">/</span><span class="nx">news</span><span class="o">/</span><span class="nx">article</span><span class="o">/</span><span class="mi">345</span> </pre></div> </div> <div class="admonition note"> <p class="first admonition-title">Note</p> <p class="last">By default the <em>index.php</em> file is included in the URL but it can be removed using a simple <em>.htaccess</em> file.</p> </div> </div> <div class="section" id="codeigniter-packs-a-punch"> <h2>CodeIgniter Packs a Punch<a class="headerlink" href="#codeigniter-packs-a-punch" title="Permalink to this headline">¶</a></h2> <p>CodeIgniter comes with full-range of libraries that enable the most commonly needed web development tasks, like accessing a database, sending email, validating form data, maintaining sessions, manipulating images, working with XML-RPC data and much more.</p> </div> <div class="section" id="codeigniter-is-extensible"> <h2>CodeIgniter is Extensible<a class="headerlink" href="#codeigniter-is-extensible" title="Permalink to this headline">¶</a></h2> <p>The system can be easily extended through the use of your own libraries, helpers, or through class extensions or system hooks.</p> </div> <div class="section" id="codeigniter-does-not-require-a-template-engine"> <h2>CodeIgniter Does Not Require a Template Engine<a class="headerlink" href="#codeigniter-does-not-require-a-template-engine" title="Permalink to this headline">¶</a></h2> <p>Although CodeIgniter <em>does</em> come with a simple template parser that can be optionally used, it does not force you to use one. Template engines simply can not match the performance of native PHP, and the syntax that must be learned to use a template engine is usually only marginally easier than learning the basics of PHP. Consider this block of PHP code:</p> <div class="highlight-ci"><div class="highlight"><pre><span class="o"><</span><span class="nx">ul</span><span class="o">></span> <span class="o"><?</span><span class="nx">php</span> <span class="k">foreach</span> <span class="p">(</span><span class="nv">$addressbook</span> <span class="k">as</span> <span class="nv">$name</span><span class="p">)</span><span class="o">:?></span> <span class="o"><</span><span class="nx">li</span><span class="o">><?=</span><span class="nv">$name</span><span class="cp">?></span><span class="nt"></li></span> <span class="cp"><?php</span> <span class="k">endforeach</span><span class="p">;</span> <span class="cp">?></span> <span class="nt"></ul></span> </pre></div> </div> <p>Contrast this with the pseudo-code used by a template engine:</p> <div class="highlight-ci"><div class="highlight"><pre><span class="o"><</span><span class="nx">ul</span><span class="o">></span> <span class="p">{</span><span class="k">foreach</span> <span class="nx">from</span><span class="o">=</span><span class="nv">$addressbook</span> <span class="nx">item</span><span class="o">=</span><span class="s2">"name"</span><span class="p">}</span> <span class="o"><</span><span class="nx">li</span><span class="o">></span><span class="p">{</span><span class="nv">$name</span><span class="p">}</span><span class="o"></</span><span class="nx">li</span><span class="o">></span> <span class="p">{</span><span class="o">/</span><span class="k">foreach</span><span class="p">}</span> <span class="o"></</span><span class="nx">ul</span><span class="o">></span> </pre></div> </div> <p>Yes, the template engine example is a bit cleaner, but it comes at the price of performance, as the pseudo-code must be converted back into PHP to run. Since one of our goals is <em>maximum performance</em>, we opted to not require the use of a template engine.</p> </div> <div class="section" id="codeigniter-is-thoroughly-documented"> <h2>CodeIgniter is Thoroughly Documented<a class="headerlink" href="#codeigniter-is-thoroughly-documented" title="Permalink to this headline">¶</a></h2> <p>Programmers love to code and hate to write documentation. We’re no different, of course, but since documentation is <strong>as important</strong> as the code itself, we are committed to doing it. Our source code is extremely clean and well commented as well.</p> </div> <div class="section" id="codeigniter-has-a-friendly-community-of-users"> <h2>CodeIgniter has a Friendly Community of Users<a class="headerlink" href="#codeigniter-has-a-friendly-community-of-users" title="Permalink to this headline">¶</a></h2> <p>Our growing community of users can be seen actively participating in our <a class="reference external" href="http://forum.codeigniter.com/">Community Forums</a>.</p> </div> </div> </div> <footer> <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> <a href="features.html" class="btn btn-neutral float-right" title="CodeIgniter Features">Next <span class="fa fa-arrow-circle-right"></span></a> <a href="getting_started.html" class="btn btn-neutral" title="Getting Started With CodeIgniter"><span class="fa fa-arrow-circle-left"></span> Previous</a> </div> <hr/> <div role="contentinfo"> <p> © Copyright 2014 - 2016, British Columbia Institute of Technology. Last updated on Mar 21, 2016. </p> </div> Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. </footer> </div> </div> </section> </div> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT:'../', VERSION:'3.0.6', COLLAPSE_INDEX:false, FILE_SUFFIX:'.html', HAS_SOURCE: false }; </script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <script type="text/javascript" src="../_static/js/theme.js"></script> <script type="text/javascript"> jQuery(function () { SphinxRtdTheme.StickyNav.enable(); }); </script> </body> </html>