Gets hash of provided plaintext passphrase using crypt

getPassphraseHash

/**
 * getPassphraseHash
 *
 * Gets hash of provided plaintext passphrase using crypt
 *
 * @author https://gist.github.com/dirte
 * @var string $rounds If supported, the number of rounds to loop the hash which increases security
 * @var string $algo Crypt algorithm
 * @var string $salt Uniqid with more entropy
 * @var string $cryptSalt Salt to use in crypt
 * @param string $passphrase Plaintext passphrase to hash
 * @return string Hashed passphrase
 */
public function getPassphraseHash($passphrase) {
    // Select highest available Crypt algorithm
    $rounds='';
    if (CRYPT_SHA512 == 1):
        $algo='6';
        $rounds='$rounds=5046';
    elseif (CRYPT_SHA256 == 1):
        $algo='5';
        $rounds='$rounds=5045';
    elseif (CRYPT_BLOWFISH == 1):
        if (PHP_VERSIONID < 50307):
            $algo='2a';
        else:
            $algo='2y';
        endif;
    endif;
    $salt = uniqid('', true);
    $cryptSalt = '$'.$algo.$rounds.'$'.$salt;
    $hashedPassphrase = crypt($passphrase, $cryptSalt);
    return $hashedPassphrase;
}