PHP password_get_info() Function Usage and Example

PHP Password Hashing Algorithm

The password_get_info() function is used to return information about the specified hash (hash).

PHP Version Requirement: PHP 5 => 5.5.0, PHP 7

Syntax

array password_get_info(string $hash)

Parameter Description:

• $hash: An array by password_hash() The created hash value.

Return Value

Returns an associative array of three elements:

• algo: Constant matching the password algorithm.

• algoName: Human-readable algorithm name.

• options: Options provided when calling password_hash().

Online Example

<?php
//　Password
$password_plaintext = "12345";
　
//　Create a hash value using password_hash()
$password_hash = password_hash($password_plaintext, PASSWORD_DEFAULT, ['cost' =>　11　);
　
//　View Information
print_r(password_get_info($password_hash));

The output is:

Array
(
　　　　[algo] =>　1
　　　　[algoName] => bcrypt
　　　　[options] => Array
　　　　　　　　(
　　　　　　　　　　　　[cost] =>　11
　　　　　　　　)
)

PHP Password Hashing Algorithm