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

​

// 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";

?>

Program 2:

 

<?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";

?>

Reference: https://www.php.net/manual/en/function.hash-copy.php