Doorstep Password Hash Function -- depreciated from php7.0

passwordHashFunction.php

// Encrypting the password
$cost = 10;
$salt = strtr(base64_encode(mcrypt_create_iv(16, MCRYPT_DEV_URANDOM)), '+', '.');
$salt = sprintf("$2a$%02d$", $cost) . $salt;
$hash = crypt('User Input Password', $salt);

// Decrypting password
if(hash_equals('User Input Password', crypt('Hash stored in database', 'User Input password'))) {
  // Password matches. Proceed.
  
} else {
  // Password is incorrect
  
}