Php/docs/function.hash
hash
(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1)
hash — Generate a hash value (message digest)
Description
hash
( string $algo
, string $data
[, bool $binary = FALSE
] ) : string|false
Parameters
algo- Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..). For a list of supported algorithms see hash_algos().
data- Message to be hashed.
binary- When set to
TRUE, outputs raw binary data.FALSEoutputs lowercase hexits.
Return Values
Returns a string containing the calculated message digest as lowercase hexits
unless binary is set to true in which case the raw
binary representation of the message digest is returned.
Examples
Example #1 A hash() example
<?phpecho hash('ripemd160', 'The quick brown fox jumped over the lazy dog.');?>
The above example will output:
ec457d0a974c48d5685a7efa03d137dc8bbde7e3
Example #2 Calculate pre PHP-5.4 tiger hashes with PHP-5.4 and higher
<?phpfunction old_tiger($data = "", $width=192, $rounds = 3) { return substr( implode( array_map( function ($h) { return str_pad(bin2hex(strrev($h)), 16, "0"); }, str_split(hash("tiger192,$rounds", $data, true), 8) ) ), 0, 48-(192-$width)/4 );}echo hash('tiger192,3', 'a-string'), PHP_EOL;echo old_tiger('a-string'), PHP_EOL;?>
Output of the above example in PHP 5.3:
146a7492719b3564094efe7abbd40a7416fd900179d02773 64359b7192746a14740ad4bb7afe4e097327d0790190fd16
Output of the above example in PHP 5.4:
64359b7192746a14740ad4bb7afe4e097327d0790190fd16 146a7492719b3564094efe7abbd40a7416fd900179d02773
See Also
- hash_file() - Generate a hash value using the contents of a given file
- hash_hmac() - Generate a keyed hash value using the HMAC method
- hash_init() - Initialize an incremental hashing context
- md5() - Calculate the md5 hash of a string
- sha1() - Calculate the sha1 hash of a string
