Online PHP editor | output for 8gbkM

<?php error_reporting(1); ini_set('display_errors', 1); class Encryption { private $key; protected $iv_size; protected $iv; public function __construct(){ $this->key = pack('H*', "bcb04b7e103a0cd8b54763051cef08bc55abe029fdebae5e1d417e2ffb2a00a3"); $this->iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC); $this->iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); } public function encryptData($input) { $output = $this->encrypt($input); return $output; } public function decryptData($input) { $output = $this->decrypt($input); return $output; } protected function decrypt($string) { $string = base64_decode($string); # retrieves the IV, iv_size should be created using mcrypt_get_iv_size() $iv_dec = substr($string, 0, $this->iv_size); # retrieves the cipher text (everything except the $iv_size in the front) $string = substr($string, $this->iv_size); # may remove 00h valued characters from end of plain text $output = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $this->key, $string, MCRYPT_MODE_CBC, $iv_dec); return $output; } protected function encrypt($string) { $output = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $this->key, $string, MCRYPT_MODE_CBC, $this->iv); # prepend the IV for it to be available for decryption $output = $this->iv . $output; # encode the resulting cipher text so it can be represented by a string $output = base64_encode($output); return $output; } } $test = new Encryption(); $encrypted = $test->encryptData("Vicky"); echo $encrypted."\n"; echo $test->decryptData($encrypted);