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62 lines
2.3 KiB
HTML
62 lines
2.3 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>返回打开的算法的初始向量大小</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.mcrypt-enc-get-iv-size" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mcrypt_enc_get_iv_size</h1>
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<p class="verinfo">(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)</p><p class="refpurpose"><span class="refname">mcrypt_enc_get_iv_size</span> — <span class="dc-title">返回打开的算法的初始向量大小</span></p>
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</div>
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<div id="function.mcrypt-enc-get-iv-size-refsynopsisdiv">
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<div class="warning"><strong class="warning">Warning</strong><p class="simpara">This function has been
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<em class="emphasis">DEPRECATED</em> as of PHP 7.1.0. Relying on this function
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is highly discouraged.</p></div>
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</div>
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<div class="refsect1 description" id="refsect1-function.mcrypt-enc-get-iv-size-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>mcrypt_enc_get_iv_size</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$td</code></span>
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) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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本函数返回由加密描述符指定的算法所使用的初始向量大小，
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以字节为单位。
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在 cbc，cfb 和 ofb 模式以及某些流模式算法中会用到初始向量。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.mcrypt-enc-get-iv-size-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">td</code></dt>
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<dd>
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<p class="para">
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加密描述符。
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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.mcrypt-enc-get-iv-size-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回初始向量大小。如果算法忽略初始向量，则返回 0。
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</p>
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</div>
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</div></div></div></body></html> |