<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Returns the error code of the last PCRE regex execution</title>
</head>
<body><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="function.preg-grep.html">preg_grep</a></div>
<div class="next" style="text-align: right; float: right;"><a href="function.preg-match-all.html">preg_match_all</a></div>
<div class="up"><a href="ref.pcre.html">PCRE Functions</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="function.preg-last-error" class="refentry">
<div class="refnamediv">
<h1 class="refname">preg_last_error</h1>
<p class="verinfo">(PHP 5 >= 5.2.0)</p><p class="refpurpose"><span class="refname">preg_last_error</span> — <span class="dc-title">Returns the error code of the last PCRE regex execution</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.preg-last-error-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">int</span> <span class="methodname"><strong>preg_last_error</strong></span>
( <span class="methodparam">void</span>
)</div>
<p class="para rdfs-comment">
Returns the error code of the last PCRE regex execution.
</p>
<p class="para">
<div class="example" id="example-4784">
<p><strong>Example #1 <span class="function"><strong>preg_last_error()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /><br />preg_match</span><span style="color: #007700">(</span><span style="color: #DD0000">'/(?:\D+|<\d+>)*[!?]/'</span><span style="color: #007700">, </span><span style="color: #DD0000">'foobar foobar foobar'</span><span style="color: #007700">);<br /><br />if (</span><span style="color: #0000BB">preg_last_error</span><span style="color: #007700">() == </span><span style="color: #0000BB">PREG_BACKTRACK_LIMIT_ERROR</span><span style="color: #007700">) {<br /> print </span><span style="color: #DD0000">'Backtrack limit was exhausted!'</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above example will output:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
Backtrack limit was exhausted!
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.preg-last-error-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns one of the following constants (<a href="pcre.constants.html" class="link">explained on their own page</a>):
<ul class="simplelist">
<li class="member"><strong><code>PREG_NO_ERROR</code></strong></li>
<li class="member"><strong><code>PREG_INTERNAL_ERROR</code></strong></li>
<li class="member"><strong><code>PREG_BACKTRACK_LIMIT_ERROR</code></strong> (see also <a href="pcre.configuration.html#ini.pcre.backtrack-limit" class="link">pcre.backtrack_limit</a>)</li>
<li class="member"><strong><code>PREG_RECURSION_LIMIT_ERROR</code></strong> (see also <a href="pcre.configuration.html#ini.pcre.recursion-limit" class="link">pcre.recursion_limit</a>)</li>
<li class="member"><strong><code>PREG_BAD_UTF8_ERROR</code></strong></li>
<li class="member"><strong><code>PREG_BAD_UTF8_OFFSET_ERROR</code></strong> (since PHP 5.3.0)</li>
</ul>
</p>
</div>
</div><hr /><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="function.preg-grep.html">preg_grep</a></div>
<div class="next" style="text-align: right; float: right;"><a href="function.preg-match-all.html">preg_match_all</a></div>
<div class="up"><a href="ref.pcre.html">PCRE Functions</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
