3des encryption and decryption with PHP

<?php
/**
 * 3des加密
 */
class Encrypt{
	public function pkcs5_pad($text, $blocksize) {
		$pad = $blocksize - (strlen($text) % $blocksize);
		return $text . str_repeat(chr($pad), $pad);
	}

	public function pkcs5_unpad($text) {
		$pad = ord($text{strlen($text) - 1});
		if ($pad > strlen($text)){
			return false;
		}
		return substr($text, 0, -1 * $pad);
	}
	
　　　　　
	/**
	* 加密
	* @param $key
	* @param $input
	* @return string
	*/
	public function des3Encryption($key,$input){
		$input = $this->pkcs5_pad($input,8);
		$td = mcrypt_module_open('tripledes', '', 'ecb', '');
		$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
		mcrypt_generic_init($td, $key, $iv);
		$en_res = mcrypt_generic($td, $input);
		mcrypt_generic_deinit($td);
		mcrypt_module_close($td);
		return $en_res;
	}
	
	/**
     * 解密
     * @param $key
     * @param $crypt
     * @return string
     */
	public function des3Decrypt($key, $crypt){
		$crypt = base64_decode($crypt);
	   $td = mcrypt_module_open('tripledes', '', 'ecb', '');
	   $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
		mcrypt_generic_init($td, $key, $iv);
		$decrypted_data = mdecrypt_generic($td, $crypt);
		mcrypt_generic_deinit($td);
		mcrypt_module_close($td);
		$decrypted_data = $this->pkcs5_unpad($decrypted_data);
		return rtrim($decrypted_data);
	}
	
	
}

$obj = new Encrypt();

$key = "9oyKs7cVo1yYzkuisP9bhA==";
$input = '123456';

$enc_res = base64_encode($obj->des3Encryption($key,$input));
echo $enc_res;

$crypt = 'KkljLXJH9jnUg4 + UyiPjzsmohuAxRTi0Iybiub47dTySoEqIK2NKg / LgKzhXWRc3Eken0YW09xcApE6kJEUfoEIsrAWnsnSCeZjr62quFEMv51BlE7RmUALXIta + P3aVRl5D6fg + xpeIgsJAY9kkhmLmdQmbvB3hMqwF / Gh7X6ZYGr7dHo4DfjNFiHaSUnDQ6s8ik1I + ye85rr2uWIZ / yPuvrRuTw05 + gFe1z01v / kWzVLfKXmsxZOrPIpNSPsnv + 08mckR2nsNT8ljOr9ggcDQovf3FgybIw3w2OraFKhnrOebzsGV0Wt5gwesKGbg8s6wam1d8qGLxLyUno74iLNRa / Kaz6LjoKWmMmpol1pEDQnM / UNCKc3Sdp34yenHj1Fr8prPouOgVBMTlBqWLtrDTl1R6apVi + ZUOnw / cKexsmJiCsHEAHK7oy6vj / 44R1QGg6H8mF5tPIfZtvp8e2i + l0eC4yveATbjJ7LcZ4 + qAEbveQC8x / eix3PBjmhYeKANzeJqNEflTuvIHQIQWuKeT9Vw0nFrR3Dt + MBQrsMV / lWs1H3w4NrgQdQEtR / 7L2wxNR2tMHM64EHUBLUf + y6 + VuMP83CbwQurJQ6l0LGSKAunFwvRbJM5CYrr8qIitU / JTokRlYdPl0yDuNqjqyQe9nS8WymTachpKe1ZmP6jIOu6rxeC0F6qI0ZH / KagceLZRBiz / R7Bf3sT15jsfqBfSiXwSROhvsa2PsLRoFz8i4eMTiLfbu0xP + Mrs65coYec + gMJK7hzpQnc5I / UJjSmjL9slAVpJc74hRGJ3dwlV / zmnmZeyeQzX3qsF3rMnopsHrYLniK + Xu / Cwl7G55Su1pGekbno2 ';

$desc_res = $obj->des3Decrypt($key,$crypt);

echo '<pre>';
echo $desc_res;


?>