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88 lines
3.5 KiB
HTML
88 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>获取字符串的长度</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.mb-strlen" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mb_strlen</h1>
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<p class="verinfo">(PHP 4 >= 4.0.6, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">mb_strlen</span> — <span class="dc-title">获取字符串的长度</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.mb-strlen-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>mb_strlen</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str</code></span>
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[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$encoding</code><span class="initializer"> = mb_internal_encoding()</span></span>
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] ) : <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span></div>
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<p class="para rdfs-comment">
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获取一个 <span class="type"><a href="language.types.string.html" class="type string">string</a></span> 的长度。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.mb-strlen-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">str</code></dt>
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<dd>
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<p class="para">
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要检查长度的<span class="type"><span class="type 字符串">字符串</span></span>。
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</p>
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</dd>
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<dt>
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<code class="parameter">encoding</code></dt>
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<dd>
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<p class="para"><code class="parameter">encoding</code>
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参数为字符编码。如果省略，则使用内部字符编码。</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.mb-strlen-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回具有 <code class="parameter">encoding</code> 编码的<span class="type"><span class="type 字符串">字符串</span></span> <code class="parameter">str</code> 包含的字符数。
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多字节的字符被计为 1。
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</p>
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<p class="para">
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如果给定的 <code class="parameter">encoding</code> 无效则返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.mb-strlen-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="mb_internal_encoding.html" class="function" rel="rdfs-seeAlso">mb_internal_encoding()</a> - 设置/获取内部字符编码</span></li>
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<li class="member"><span class="function"><a href="grapheme_strlen.html" class="function" rel="rdfs-seeAlso">grapheme_strlen()</a> - Get string length in grapheme units</span></li>
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<li class="member"><span class="function"><a href="iconv_strlen.html" class="function" rel="rdfs-seeAlso">iconv_strlen()</a> - 返回字符串的字符数统计</span></li>
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<li class="member"><span class="function"><a href="strlen.html" class="function" rel="rdfs-seeAlso">strlen()</a> - 获取字符串长度</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> |