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138 lines
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HTML
138 lines
5.7 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>查找指定字符在字符串中的最后一次出现</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.strrchr" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">strrchr</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">strrchr</span> — <span class="dc-title">查找指定字符在字符串中的最后一次出现</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.strrchr-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>strrchr</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$haystack</code></span>
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, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$needle</code></span>
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) : <span class="type">string</span></div>
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<p class="para rdfs-comment">
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该函数返回 <code class="parameter">haystack</code> 字符串中的一部分，这部分以 <code class="parameter">needle</code> 的最后出现位置开始，直到 <code class="parameter">haystack</code> 末尾。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.strrchr-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">haystack</code></dt>
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<dd>
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<p class="para">
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在该字符串中查找。
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</p>
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</dd>
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<dt>
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<code class="parameter">needle</code></dt>
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<dd>
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<p class="para">
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如果 <code class="parameter">needle</code> 包含了不止一个字符，那么仅使用第一个字符。该行为不同于 <span class="function"><a href="strstr.html" class="function">strstr()</a></span>。
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</p>
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<p class="para">
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如果 <code class="parameter">needle</code> 不是一个字符串，那么将被转化为整型并被视为字符顺序值。
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.strrchr-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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该函数返回字符串的一部分。如果 <code class="parameter">needle</code> 未被找到，返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.strrchr-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>4.3.0</td>
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<td>
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该函数是二进制安全的。
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.strrchr-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="strcspn.example">
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<p><strong>Example #1 <span class="function"><strong>strrchr()</strong></span> 范例</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 /></span><span style="color: #FF8000">// 获取 $PATH 中不含磁盘符号的目录<br /></span><span style="color: #0000BB">$dir </span><span style="color: #007700">= </span><span style="color: #0000BB">substr</span><span style="color: #007700">(</span><span style="color: #0000BB">strrchr</span><span style="color: #007700">(</span><span style="color: #0000BB">$PATH</span><span style="color: #007700">, </span><span style="color: #DD0000">":"</span><span style="color: #007700">), </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 获取最后一行内容<br /></span><span style="color: #0000BB">$text </span><span style="color: #007700">= </span><span style="color: #DD0000">"Line 1\nLine 2\nLine 3"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$last </span><span style="color: #007700">= </span><span style="color: #0000BB">substr</span><span style="color: #007700">(</span><span style="color: #0000BB">strrchr</span><span style="color: #007700">(</span><span style="color: #0000BB">$text</span><span style="color: #007700">, </span><span style="color: #0000BB">10</span><span style="color: #007700">), </span><span style="color: #0000BB">1 </span><span style="color: #007700">);<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>
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</p>
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</div>
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<div class="refsect1 notes" id="refsect1-function.strrchr-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此函数可安全用于二进制对象。</span></p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.strrchr-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="strstr.html" class="function" rel="rdfs-seeAlso">strstr()</a> - 查找字符串的首次出现</span></li>
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<li class="member"><span class="function"><a href="strrpos.html" class="function" rel="rdfs-seeAlso">strrpos()</a> - 计算指定字符串在目标字符串中最后一次出现的位置</span></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> |