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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>Generate a keyed hash value using the HMAC method and the contents of a given file</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.hash-final.html">hash_final</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.hash-hmac.html">hash_hmac</a></div> <div class="up"><a href="ref.hash.html">Hash Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.hash-hmac-file" class="refentry"> <div class="refnamediv"> <h1 class="refname">hash_hmac_file</h1> <p class="verinfo">(PHP 5 >= 5.1.2, PECL hash:1.1-1.5)</p><p class="refpurpose"><span class="refname">hash_hmac_file</span> — <span class="dc-title">Generate a keyed hash value using the HMAC method and the contents of a given file</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">string</span> <span class="methodname"><b><b>hash_hmac_file</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$algo</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$filename</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$key</tt></span> [, <span class="methodparam"><span class="type">bool</span> <tt class="parameter">$raw_output</tt></span> ] )</div> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">algo</tt></i></span> <dd> <p class="para"> Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..) </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">filename</tt></i></span> <dd> <p class="para"> URL describing location of file to be hashed; Supports fopen wrappers. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">key</tt></i></span> <dd> <p class="para"> Shared secret key used for generating the HMAC variant of the message digest. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">raw_output</tt></i></span> <dd> <p class="para"> When set to <b><tt>TRUE</tt></b>, outputs raw binary data. Default value (<b><tt>FALSE</tt></b>) outputs lowercase hexits. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns a string containing the calculated message digest as lowercase hexits unless <i><tt class="parameter">raw_output</tt></i> is set to true in which case the raw binary representation of the message digest is returned. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>hash_hmac_file()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">/* Create a file to calculate hash of */<br /></span><span style="color: #0000BB">file_put_contents</span><span style="color: #007700">(</span><span style="color: #DD0000">'example.txt'</span><span style="color: #007700">, </span><span style="color: #DD0000">'The quick brown fox jumped over the lazy dog.'</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #0000BB">hash_hmac_file</span><span style="color: #007700">(</span><span style="color: #DD0000">'md5'</span><span style="color: #007700">, </span><span style="color: #DD0000">'example.txt'</span><span style="color: #007700">, </span><span style="color: #DD0000">'secret'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>7eb2b5c37443418fc77c136dd20e859c</pre></div> </pre></div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.hash-hmac.html" class="function" rel="rdfs-seeAlso">hash_hmac()</a></li> <li class="member"><a href="function.hash-file.html" class="function" rel="rdfs-seeAlso">hash_file()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.hash-final.html">hash_final</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.hash-hmac.html">hash_hmac</a></div> <div class="up"><a href="ref.hash.html">Hash Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>?? 快捷鍵說明
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