(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1)
hash — Generate a hash value (message digest)
hash ( string $algo , string $data [, bool $binary = false ] ) : string|false
algo
Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..). For a list of supported algorithms see hash_algos().
data
Message to be hashed.
binary
When set to true, outputs raw binary data. false outputs lowercase hexits.
Returns a string containing the calculated message digest as lowercase hexits unless binary is set to true in which case the raw binary representation of the message digest is returned.
Example #1 A hash() example
<?php
echo hash('ripemd160', 'The quick brown fox jumped over the lazy dog.');
?> The above example will output:
ec457d0a974c48d5685a7efa03d137dc8bbde7e3
Example #2 Calculate pre PHP-5.4 tiger hashes with PHP-5.4 and higher
<?php
function old_tiger($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
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https://www.php.net/manual/en/function.hash.php