$parol = crypt( $_SERVER['PHP_AUTH_PW'] , 'соль');
echo hash("sha256" , "my_password" . "salt");
$6 - use SHA-512, which has 64-bit operations that reduce the margin of advantage most GPU based attackers have over you as of early 2016.
$rounds=150000 - set the number of iterations to hundreds of thousands or high tens of thousands of rounds.
PerUserCryptoRandomSalt - unlike password_hash, you have to do this yourself. You need to generate a unique, cryptographically random salt of 12-24 binary bytes (16 is very reasonable)