PHP hash() function

This function is used to convert data in hash form. This is used for security purpose to convert messages, username, password in hash format.

Syntax

hash(algorithmname, string, rowoutput);

First parameter is the algorithm name like sha1, md5, sha2, sha512. Second parameter is the string that will be hashed. The rowoutput is optional, if it is set to TRUE, then it returns raw binary data and is set to FALSE then returns lowercase exits.

Example

<?php
    $username = 'myuser';
    $secret_msg = 'abc123';
    $uname = hash(md5, $username);
    $msg =  hash(sha1, $secret_msg);
    echo $uname.'<br/>';
    echo $msg.'<br/>';
?>

Output -

5d5a582e5adf896ed6e1474c700b481a
6367c48dd193d56ea7b0baad25b19455e529f5ee




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