encryptor method in php

 function encryptor($action, $string) {

        $output = false;

        $encrypt_method = "AES-256-CBC";

        //pls set your unique hashing key

        $secret_key = 'secret_key'

        $secret_iv = 'secret_iv'

        // hash

        $key = hash('sha256', $secret_key);

        // iv - encrypt method AES-256-CBC expects 16 bytes - else you will get a warning

        $iv = substr(hash('sha256', $secret_iv), 0, 16);

        //do the encyption given text/string/number

        if ($action == 'encrypt') {

            $output = openssl_encrypt($string, $encrypt_method, $key, 0, $iv);

            $output = base64_encode($output);

        } else if ($action == 'decrypt') {

            //decrypt the given text/string/number

            $output = openssl_decrypt(base64_decode($string), $encrypt_method, $key, 0, $iv);

        }

        return $output;

    }