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63 lines
3.5 KiB
HTML
63 lines
3.5 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>返回最后一个PCRE正则执行产生的错误代码</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.preg-last-error" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">preg_last_error</h1>
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<p class="verinfo">(PHP 5 >= 5.2.0, PHP 7)</p><p class="refpurpose"><span class="refname">preg_last_error</span> — <span class="dc-title">返回最后一个PCRE正则执行产生的错误代码</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.preg-last-error-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>preg_last_error</strong></span>
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( <span class="methodparam">void</span>
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) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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返回最后一次PCRE正则执行的错误代码。
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</p>
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<p class="para">
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<div class="example" id="example-5858">
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<p><strong>Example #1 <span class="function"><strong>preg_last_error()</strong></span> 示例</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<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>
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</span>
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</pre></div>
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</div>
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<div class="example-contents"><p>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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Backtrack limit was exhausted!
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.preg-last-error-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回下面常量中的一个(<a href="pcre.constants.html" class="link">查看它们自身的解释</a>):
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<ul class="simplelist">
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<li class="member"><strong><code>PREG_NO_ERROR</code></strong></li>
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<li class="member"><strong><code>PREG_INTERNAL_ERROR</code></strong></li>
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<li class="member"><strong><code>PREG_BACKTRACK_LIMIT_ERROR</code></strong> （参见 <a href="pcre.configuration.html#ini.pcre.backtrack-limit" class="link">pcre.backtrack_limit</a>）</li>
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<li class="member"><strong><code>PREG_RECURSION_LIMIT_ERROR</code></strong> （参见 <a href="pcre.configuration.html#ini.pcre.recursion-limit" class="link">pcre.recursion_limit</a>）</li>
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<li class="member"><strong><code>PREG_BAD_UTF8_ERROR</code></strong></li>
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<li class="member"><strong><code>PREG_BAD_UTF8_OFFSET_ERROR</code></strong> （自 PHP 5.3.0 起）</li>
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<li class="member"><strong><code>PREG_JIT_STACKLIMIT_ERROR</code></strong> (自 PHP 7.0.0 起)</li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |