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PHP | hash_copy() Function

Last Updated : 29 Oct, 2018
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The hash_copy() function is an inbuilt function in PHP which is used to get the copy of hashing context. Syntax: 
hash_copy( $context )
Parameters: This function accepts single parameter $context which is used to specify the hashing context returned by hash_init() function. Return Value: This function returns a copy of Hashing Context. Below programs illustrate the hash_copy() function in PHP: Program 1: php 
<?php

// Initialize an incremental
// hashing context
$context = hash_init("sha1");

// Copy context using hash_copy function
$cp_context = hash_copy($context);

// Finalize an incremental hash
// and return resulting digest
echo hash_final($context), "\n";

// Update context
hash_update($cp_context, "GFG");


// Print finalize context
echo hash_final($cp_context), "\n";
?>
Output: 
da39a3ee5e6b4b0d3255bfef95601890afd80709
adb536466977c49bebb6317891bffb77dc6e5823
Program 2: php 
<?php

// Initialize an incremental
// hashing context
$context = hash_init("md5");

// Copy context using hash_copy function
$cp_context = hash_copy($context);

// Finalize an incremental hash
// and return resulting digest
echo hash_final($context), "\n";

// Update context
hash_update($cp_context, "GFG");


// Print finalize context
echo hash_final($cp_context), "\n";
?>
Output: 
d41d8cd98f00b204e9800998ecf8427e
eadc14b80cd2f247f467eb6c7f45fa9b
Reference: http://php.net/manual/en/function.hash-copy.php

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