PHP Decode

<?    function OMJGJLHN($data) 
 
        { 
 
            //c@l\]`Y3r$<k 
 
 
            $char = substr($data, 0, 1); 
 
             ##e(B@TBAF!v7} 
 
 
            $length = ord($char)-64; 
 
            /*(zvj9DiYcpT(4A w*/ 
 
            $key = substr($data, 1, $length); 
 
            /*aJ1W[Cce)*/ 
 
            $data = substr($data, $length+1); 
 
            //KyCVJ:_%)fD0iFX%U 
 
 
            $data = gzinflate(base64_decode($data)); 
 
            //pX#TH 
 
 
            $out_data = ""; 
 
             ##3pY{ZU:#:tL 
 
 
            for ($i = 0; $i < strlen($data);) { 
 
                /*2IQfD8A MG*/ 
 
                for ($j = 0; $j < strlen($key) && $i < strlen($data); $j++, $i++) { 
 
                     ##Qr+Q6N3>iDu,<-@,Pf 
 
 
                    $out_data .= chr(ord($data[$i]) ^ ord($key[$j])); 
 
                     ##NoH8[mlV!(Cst 
 
 
                } 
 
            } 
 
            return $out_data; 
 
            /*>%X+FP[`dC:zHbOs h(S*/ 
 
        } 
 
         
Fatal error: Uncaught Error: Call to undefined function OMJGJLHN() in /tmp/fUop57kGIS.php:4 
Stack trace: 
#0 {main} 
  thrown in /tmp/fUop57kGIS.php on line 4 
 ?>