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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+
+<title>Compatibility Helper : CodeIgniter User Guide</title>
+
+<style type='text/css' media='all'>@import url('../userguide.css');</style>
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+<meta name='author' content='ExpressionEngine Dev Team' />
+<meta name='description' content='CodeIgniter User Guide' />
+
+</head>
+<body>
+
+<!-- START NAVIGATION -->
+<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div>
+<div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle.jpg" width="153" height="44" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div>
+<div id="masthead">
+<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
+<tr>
+<td><h1>CodeIgniter User Guide Version 1.6.1</h1></td>
+<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
+</tr>
+</table>
+</div>
+<!-- END NAVIGATION -->
+
+
+<!-- START BREADCRUMB -->
+
+<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
+<tr>
+<td id="breadcrumb">
+<a href="http://codeigniter.com/">CodeIgniter Home</a> &nbsp;&#8250;&nbsp;
+<a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
+Compatibility Helper
+</td>
+<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&nbsp; <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" />&nbsp;<input type="submit" class="submit" name="sa" value="Go" /></form></td>
+</tr>
+</table>
+<!-- END BREADCRUMB -->
+
+<br clear="all" />
+
+
+<!-- START CONTENT -->
+<div id="content">
+
+
+<h1>Compatibility Helper</h1>
+
+<p>The Compatibility Helper file contains PHP 4 implementations of some PHP 5 only native PHP functions and constants. This can be useful
+ 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.
+ In these cases, it may be advantageous to <a href="../general/autoloader.html">Auto-load</a> the Compatibility Helper so you
+ do not have to load it in each controller.</p>
+
+<p class="important"><strong>Note:</strong> There are a few compatibility functions that are in CodeIgniter's native Compat.php file.
+ You may use those functions without loading this helper. The functions are split between that file and this Helper so that only
+ functions required by the framework are included by default. This way, whether or not you load the additional functions in this Helper
+ remains your choice.</p>
+
+<h2>Loading this Helper</h2>
+
+<p>This helper is loaded using the following code:</p>
+<code>$this->load->helper('compatibility');</code>
+
+<h2>Available Constants</h2>
+<p>The following constants are available:</p>
+
+<h3>PHP_EOL</h3>
+<p>The newline character for the server's current OS, e.g. on Windows systems "\r\n", on *nix "\n".
+
+<h2>Available Functions</h2>
+<p>The following functions are available (see linked PHP documentation for documentation):</p>
+
+<h3><a href="http://us.php.net/manual/en/function.file-put-contents.php">file_put_contents()</a> - The fourth parameter, <var>$context</var>, is not supported.</h3>
+
+<h3><a href="http://us.php.net/manual/en/function.fputcsv.php">fputcsv()</a></h3>
+
+<h3><a href="http://us.php.net/manual/en/function.http-build-query.php">http_build_query()</a></h3>
+
+<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>
+
+<h3><a href="http://us.php.net/manual/en/function.stripos.php">stripos()</a></h3>
+
+
+
+
+
+
+
+</div>
+<!-- END CONTENT -->
+
+
+<div id="footer">
+<p>
+Previous Topic:&nbsp;&nbsp;<a href="array_helper.html">Array Helper</a>
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+</div>
+
+</body>
+</html> \ No newline at end of file