PHP | hash_copy() Function

Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP hash_copy() Function.

The PHP hash_copy() function is used to copy the hashing context generated from hash_init().

Syntax

Following below is the syntax to use this function -

hash_copy ( HashContext $context ) : HashContext

READ: PHP | algos() Function

Parameter Details

Sr.No	Parameter & Description
1	HashContext context The hash context that you get using hash_init().

Return Value

It returns a copy of hash context. The hash context can be used along with other hash function like hash_update_file(), hash_final(), hash_update() and hash_update_stream().

PHP Version

This built-in PHP function works from PHP version greater than 5.3.0.

Example1

Working with the built-in PHP hash_copy() and hash_init() functions -

<?php
   $hash_context = hash_init("md5");
   hash_update($hash_context, "Welcome To Webdesigntutorialz");
   $hash_copy= hash_copy($hash_context);
   echo hash_final($hash_context);
   echo "<br/>";
   hash_update($hash_copy,  "Welcome To Webdesigntutorialz");
   echo hash_final($hash_copy);
?>

Output

When the above code is executed, it will produce the following result -

380d3ca1b0ab972f207209c076895310<br/>621058f8d42e78586b987c7b5233dc77

Example2

Working with the hash_copy() and sha256

<?php
   $hash_context = hash_init("sha256");
   hash_update($hash_context, "Welcome To Webdesigntutorialz");
   $hash_copy = hash_copy($hash_context);
   hash_update($hash_copy,  "Welcome To Webdesigntutorialz");
   echo hash_final($hash_copy);
?>

Output

When the above code is executed, it will produce the following result -

c37c7726bd39bab917ab8eb2143f914f9c37937bc48fb3b3ef11860867f93c20

READ: PHP | hash() Function

Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial, we will be studying about the hash_equals() Function.

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