Password validation

Question

How can we validate password in php?

Answer 1

(PHP 5 >= 5.5.0, PHP 7) password_verify ( string $password , string $hash ) : bool
example

<?php
// See the password_hash() example to see where this came from.
$hash = '$2y$07$BCryptRequires22Chrcte/VlQH0piJtjXl.0t1XkA8pw9dMXTpOq';

if (password_verify('rasmuslerdorf', $hash)) {
    echo 'Password is valid!';
} else {
    echo 'Invalid password.';
}
?>