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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>Compatibility Helper : CodeIgniter User Guide</title>
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<style type='text/css' media='all'>@import url('../userguide.css');</style>
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<meta name='author' content='ExpressionEngine Dev Team' />
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<meta name='description' content='CodeIgniter User Guide' />
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<div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle_darker.jpg" width="154" height="43" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div>
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<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
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<tr>
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<td><h1>CodeIgniter User Guide Version 1.7.1</h1></td>
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<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
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</tr>
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</div>
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<tr>
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<td id="breadcrumb">
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<a href="http://codeigniter.com/">CodeIgniter Home</a> ›
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<a href="../index.html">User Guide Home</a> ›
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Compatibility Helper
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</td>
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<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="codeigniter.com/user_guide/" />Search User Guide <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td>
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<!-- START CONTENT -->
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<div id="content">
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<h1>Compatibility Helper</h1>
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<p>The Compatibility Helper file contains PHP 4 implementations of some PHP 5 only native PHP functions and constants. This can be useful
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if you'd like to take advantage of some of these native function but your application may end up running on a PHP 4 server.
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In these cases, it may be advantageous to <a href="../general/autoloader.html">Auto-load</a> the Compatibility Helper so you
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do not have to load it in each controller.</p>
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<p class="important"><strong>Note:</strong> There are a few compatibility functions that are in CodeIgniter's native Compat.php file.
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You may use those functions without loading this helper. The functions are split between that file and this Helper so that only
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functions required by the framework are included by default. This way, whether or not you load the additional functions in this Helper
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remains your choice.</p>
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<h2>Loading this Helper</h2>
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<p>This helper is loaded using the following code:</p>
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<code>$this->load->helper('compatibility');</code>
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<h2>Available Constants</h2>
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<p>The following constants are available:</p>
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<h3>PHP_EOL</h3>
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<p>The newline character for the server's current OS, e.g. on Windows systems "\r\n", on *nix "\n".
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<h2>Available Functions</h2>
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<p>The following functions are available (see linked PHP documentation for documentation):</p>
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<h3><a href="http://us.php.net/manual/en/function.file-put-contents.php">file_put_contents()</a> - The fourth parameter, <var>$context</var>, is not supported.</h3>
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<h3><a href="http://us.php.net/manual/en/function.fputcsv.php">fputcsv()</a></h3>
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<h3><a href="http://us.php.net/manual/en/function.http-build-query.php">http_build_query()</a></h3>
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<h3><a href="http://us.php.net/manual/en/function.str-ireplace.php">str_ireplace()</a> - The fourth parameter, <var>$count</var>, is not supported, as PHP 4 would make it become required.</h3>
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<h3><a href="http://us.php.net/manual/en/function.stripos.php">stripos()</a></h3>
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</div>
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<!-- END CONTENT -->
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<div id="footer">
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<p>
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Previous Topic: <a href="array_helper.html">Array Helper</a>
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<a href="#top">Top of Page</a> ·
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</body>
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