<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Copy hashing context</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.hash-algos.html">hash_algos</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.hash-file.html">hash_file</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-copy" class="refentry"> <div class="refnamediv"> <h1 class="refname">hash_copy</h1> <p class="verinfo">(PHP 5 >= 5.3.0)</p><p class="refpurpose"><span class="refname">hash_copy</span> — <span class="dc-title">Copy hashing context</span></p> </div> <div class="refsect1 description" id="refsect1-function.hash-copy-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">resource</span> <span class="methodname"><strong>hash_copy</strong></span> ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$context</code></span> )</div> </div> <div class="refsect1 parameters" id="refsect1-function.hash-copy-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter">context</code></em></span> <dd> <p class="para"> Hashing context returned by <span class="function"><a href="function.hash-init.html" class="function">hash_init()</a></span>. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.hash-copy-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns a copy of Hashing Context resource. </p> </div> <div class="refsect1 examples" id="refsect1-function.hash-copy-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-829"> <p><strong>Example #1 <span class="function"><strong>hash_copy()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />$context </span><span style="color: #007700">= </span><span style="color: #0000BB">hash_init</span><span style="color: #007700">(</span><span style="color: #DD0000">"md5"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">hash_update</span><span style="color: #007700">(</span><span style="color: #0000BB">$context</span><span style="color: #007700">, </span><span style="color: #DD0000">"data"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* copy context to be able to continue using it */<br /></span><span style="color: #0000BB">$copy_context </span><span style="color: #007700">= </span><span style="color: #0000BB">hash_copy</span><span style="color: #007700">(</span><span style="color: #0000BB">$context</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #0000BB">hash_final</span><span style="color: #007700">(</span><span style="color: #0000BB">$context</span><span style="color: #007700">), </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">hash_update</span><span style="color: #007700">(</span><span style="color: #0000BB">$copy_context</span><span style="color: #007700">, </span><span style="color: #DD0000">"data"</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">hash_final</span><span style="color: #007700">(</span><span style="color: #0000BB">$copy_context</span><span style="color: #007700">), </span><span style="color: #DD0000">"\n"</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 screen"> <div class="cdata"><pre> 8d777f385d3dfec8815d20f7496026dc 511ae0b1c13f95e5f08f1a0dd3da3d93 </pre></div> </div> </div> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.hash-algos.html">hash_algos</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.hash-file.html">hash_file</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>