A hash function is any function that can be used to map data of arbitrary size to data of a fixed size. The values returned by a hash function are called hash values, hash codes, digests, or simply hashes.
Syntax
string hash( string $algo , string $data [, bool $raw_output = FALSE ] )
Parameters
algo
Name of selected hashing algorithm (like "md5", "sha256", "haval160,4", etc..)
data
Message to be hashed.
raw_output
When setting to TRUE, outputs raw binary data. FALSE outputs lowercase hexits.
Example
<?php
echo hash('sha256', 'Weelcome Tutorials Point');
?>Output
dacbedc476c664e457b165580dd5eb491bc027c914504066c51f56b1116d56e0