$someString = 'abcds'
$secretKey = 'Some-random-key';

$output = false;
$encryptMethod = 'AES-256-CBC';
$keyHash = hash( 'sha256', $secretKey );
$key = substr($keyHash, 0, 32);
$iv = substr($keyHash, 32, 16);

// Encrypt
echo base64_encode( openssl_encrypt( $string, $encryptMethod, $key, 0, $iv ) );

// Decrypt
openssl_decrypt( base64_decode( $string ), $encryptMethod, $key, 0, $iv );


        return $output;