function.mcrypt-enc-get-supported-key-sizes.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Returns an array with the supported keysizes of the opened algorithm</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.mcrypt-enc-get-modes-name.html">mcrypt_enc_get_modes_name</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.mcrypt-enc-is-block-algorithm-mode.html">mcrypt_enc_is_block_algorithm_mode</a></div> <div class="up"><a href="ref.mcrypt.html">Mcrypt Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.mcrypt-enc-get-supported-key-sizes" class="refentry"> <div class="refnamediv"> <h1 class="refname">mcrypt_enc_get_supported_key_sizes</h1> <p class="verinfo">(PHP 4 >= 4.0.2, PHP 5)</p><p class="refpurpose"><span class="refname">mcrypt_enc_get_supported_key_sizes</span> — <span class="dc-title">Returns an array with the supported keysizes of the opened algorithm</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><b><b>mcrypt_enc_get_supported_key_sizes</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$td</tt></span> )</div> <p class="para rdfs-comment"> Returns an array with the key sizes supported by the algorithm specified by the encryption descriptor. If it returns an empty array then all key sizes between 1 and <a href="function.mcrypt-enc-get-key-size.html" class="function">mcrypt_enc_get_key_size()</a> are supported by the algorithm. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>mcrypt_enc_get_supported_key_sizes()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /> $td </span><span style="color: #007700">= </span><span style="color: #0000BB">mcrypt_module_open</span><span style="color: #007700">(</span><span style="color: #DD0000">'rijndael-256'</span><span style="color: #007700">, </span><span style="color: #DD0000">''</span><span style="color: #007700">, </span><span style="color: #DD0000">'ecb'</span><span style="color: #007700">, </span><span style="color: #DD0000">''</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">mcrypt_enc_get_supported_key_sizes</span><span style="color: #007700">(</span><span style="color: #0000BB">$td</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p> This will print: </p></div> <div class="example-contents"><pre><div class="cdata"><pre>array(3) { [0]=> int(16) [1]=> int(24) [2]=> int(32)}</pre></div> </pre></div> </div> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.mcrypt-enc-get-modes-name.html">mcrypt_enc_get_modes_name</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.mcrypt-enc-is-block-algorithm-mode.html">mcrypt_enc_is_block_algorithm_mode</a></div> <div class="up"><a href="ref.mcrypt.html">Mcrypt Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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