(PHP 5 >= 5.5.0)
password_needs_rehash — Checks if the given hash matches the given options
$hash
, string $algo
[, string $options
] )This function checks to see if the supplied hash implements the algorithm and options provided. If not, it is assumed that the hash needs to be rehashed.
hash
A hash created by password_hash().
algo
A password algorithm constant denoting the algorithm to use when hashing the password.
options
An associative array containing options. Currently, two options are supported: salt, to provide a salt to use when hashing the password, and cost, which denotes the algorithmic cost that should be used. Examples of these values can be found on the crypt() page.
If omitted, the default cost will be used.
Returns TRUE if the hash should be rehashed to match the given
algo and options, or FALSE
otherwise.