class Encryption {
    
		var $skey     = "aAaA";
		
		public  function safe_b64encode($string) {
		
			$data = base64_encode($string);
			$data = str_replace(array('+','/','='),array('-','_',''),$data);
			return $data;
		}
	 
		public function safe_b64decode($string) {
			$data = str_replace(array('-','_'),array('+','/'),$string);
			$mod4 = strlen($data) % 4;
			if ($mod4) {
				$data .= substr('====', $mod4);
			}
			return base64_decode($data);
		}
		
		public  function encode($value){ 
			
			if(!$value){return false;}
			$text = $value;
			$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
			$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
			$crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $this->skey, $text, MCRYPT_MODE_ECB, $iv);
			return trim($this->safe_b64encode($crypttext)); 
		}
		
		public function decode($value){
			
			if(!$value){return false;}
			$crypttext = $this->safe_b64decode($value); 
			$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
			$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
			$decrypttext = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $this->skey, $crypttext, MCRYPT_MODE_ECB, $iv);
			return trim($decrypttext);
		}
	}
	
	$sifrele  = new Encryption;

$sifrele->encode('veri');

$sifrele->decode('veri');