Cryptographic Hash

A cryptographic hash is an algorithm which maps a string to a fixed sized string, with a method that is difficult or impossible to revert.

Some famous algorithms: MD5, SHA1, SHA256, HAVAL, Bcrypt.

Other algorithms include crc32(), though it is not considered a cryptography.

While the extension hash `` only process hashes, there are other extensions which offer these features:  ``openssl, sodium `` and  ``password hashing. Mhash and mcrypt are older PHP extensions, which are now discontinued.

<?php

    echo hash('ripemd160', 'The quick brown fox jumped over the lazy dog.');
    // produces ec457d0a974c48d5685a7efa03d137dc8bbde7e3

?>

Documentation

Related : hash() Function, Hash, Array, Map, Crack, hash_equals(), One-Time Password (OTP)