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74 lines
2.4 KiB
HTML
74 lines
2.4 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>检查字符串在指定的编码里是否有效</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-check-encoding" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mb_check_encoding</h1>
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<p class="verinfo">(PHP 4 >= 4.4.3, PHP 5 >= 5.1.3, PHP 7)</p><p class="refpurpose"><span class="refname">mb_check_encoding</span> — <span class="dc-title">检查字符串在指定的编码里是否有效</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.mb-check-encoding-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_check_encoding</strong></span>
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([ <span class="methodparam"><span class="type">string</span> <code class="parameter">$var</code><span class="initializer"> = <strong><code>NULL</code></strong></span></span>
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[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$encoding</code><span class="initializer"> = mb_internal_encoding()</span></span>
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]] ) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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检查指定的字节流在指定的编码里是否有效。它能有效避免所谓的“无效编码攻击（Invalid Encoding Attack）”。
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</p>
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<p class="para">
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.mb-check-encoding-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">var</code></dt>
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<dd>
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<p class="para">
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要检查的字节流。如果省略了这个参数，此函数会检查所有来自最初请求所有的输入。
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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">
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期望的编码。
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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.mb-check-encoding-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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</div></div></div></body></html> |