(PHP 5 >= 5.5.0, PHP 7)
openssl_pbkdf2 — Generates a PKCS5 v2 PBKDF2 string, defaults to SHA-1
$password
, string $salt
, int $key_length
, int $iterations
[, string $digest_algorithm
] )
This function is currently not documented; only its argument list is available.
password
salt
key_length
iterations
digest_algorithm
Returns string or FALSE on failure.
Despite the manual claiming that this is available in PHP 5.5 and above, this function wasn't made available in my local install.
I expect that having a prehistoric OpenSSL library version installed is the likely culprit.
If you're using PHP 5.5 and don't have this function available in your OpenSSL extension, look at the functionally equivalent hash_pbkdf2 function instead.
