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+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+  <title>Helpers &mdash; CodeIgniter 3.1.10 documentation</title>
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+    <link rel="shortcut icon" href="../_static/ci-icon.ico"/>
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+    <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" />
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+    <link rel="top" title="CodeIgniter 3.1.10 documentation" href="../index.html"/>
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+<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
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+<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>
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+<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 class="current">
+<li class="toctree-l1 current"><a class="current reference internal" href="#">Helpers</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="array_helper.html">Array Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="captcha_helper.html">CAPTCHA Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="cookie_helper.html">Cookie Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="date_helper.html">Date Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="directory_helper.html">Directory Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="download_helper.html">Download Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="email_helper.html">Email Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="file_helper.html">File Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="form_helper.html">Form Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="html_helper.html">HTML Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="inflector_helper.html">Inflector Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="language_helper.html">Language Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="number_helper.html">Number Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="path_helper.html">Path Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="security_helper.html">Security Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="smiley_helper.html">Smiley Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="string_helper.html">String Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="text_helper.html">Text Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="typography_helper.html">Typography Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="url_helper.html">URL Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="xml_helper.html">XML Helper</a></li>
+</ul>
+</li>
+</ul>
+
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+<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
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+<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>
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+<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
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+<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>
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+<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
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+<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>
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+<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>
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+<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>
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+<ul class="current">
+<li class="toctree-l1 current"><a class="current reference internal" href="#">Helpers</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="array_helper.html">Array Helper</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="cookie_helper.html">Cookie Helper</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="form_helper.html">Form Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="html_helper.html">HTML Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="inflector_helper.html">Inflector Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="language_helper.html">Language Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="number_helper.html">Number Helper</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="security_helper.html">Security Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="smiley_helper.html">Smiley Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="string_helper.html">String Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="text_helper.html">Text Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="typography_helper.html">Typography Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="url_helper.html">URL Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="xml_helper.html">XML Helper</a></li>
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+<li class="toctree-l1"><a class="reference internal" href="cookie_helper.html">Cookie Helper</a></li>
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+<li class="toctree-l1"><a class="reference internal" href="security_helper.html">Security Helper</a></li>
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+<li class="toctree-l1"><a class="reference internal" href="string_helper.html">String Helper</a></li>
+<li class="toctree-l1"><a class="reference internal" href="text_helper.html">Text Helper</a></li>
+<li class="toctree-l1"><a class="reference internal" href="typography_helper.html">Typography Helper</a></li>
+<li class="toctree-l1"><a class="reference internal" href="url_helper.html">URL Helper</a></li>
+<li class="toctree-l1"><a class="reference internal" href="xml_helper.html">XML Helper</a></li>
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