PHP | hash_update() Function

PHP hash_update() Function


Hello dear readers! welcome back to another edition of our tutorial on PHP. In this tutorial guide, we are going to be discussing about the PHP hash_update() Function.

The built-in hash_update() function updates the given data with the hash context.

Syntax

Following below is the syntax to use this function -

hash_update(HashContext $context , string $data ): bool


Parameter Details

Sr.NoParameter & Description
1

HashContext context

The hash context that you get using hash_init().

2

data

The data you want to mix with the hash context.


Return Value

This built-in PHP functions returns true or false.

PHP Version

This built-in function works from PHP version greater than 5.1.2.

Example1

Following example illustrates the usage of the built-in hash_update() function -

<?php
   $hash_context = hash_init('md5');
   hash_update($hash_context, 'Testing php');
   hash_update($hash_context, ' hash functions.');
   echo hash_final($hash_context);
?>

Output

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

e4310012c89a4b8479fd83694a2a3a31

Example2
Following example illustrates the usage of the built-in hash_update() function with the gost-crypto algo -

<?php
   $hash_context = hash_init('gost-crypto');
   hash_update($hash_context, 'Hello World');
   echo hash_final($hash_context);
?>

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

75ed15d84df84291c67fe07bf234ac69e92a9c2a378ee62f342af739e829eba9


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

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