$strAESKey128 = "z#x^IcOo12345678";  // 16자리
$strAESKeyIV = str_repeat(chr(0), 16); #Same as in JAVA  16자리

if ( !function_exists( 'hex2bin' ) ) {
 function hex2bin($hexdata) {
  $bindata = '';

  for ($i = 0; $i < strlen($hexdata); $i += 2) {
   $bindata .= chr(hexdec(substr($hexdata, $i, 2)));
  }
  return $bindata;
 }
}

function decrypt ($value)        
{                     
    global $strAESKey128, $strAESKeyIV;
    $value = hex2bin($value) ;                
    $output = mcrypt_decrypt (MCRYPT_RIJNDAEL_128, $strAESKey128, $value, MCRYPT_MODE_CBC, str_repeat(chr(0),16)) ;                
    
    $valueLen = strlen ($output) ;
    if ( $valueLen % 16 > 0 )
        $output = "";

    $padSize = ord ($output{$valueLen - 1}) ;
    if ( ($padSize < 1) or ($padSize > 16) )
        $output = "";                // Check padding.                

    for ($i = 0; $i < $padSize; $i++)
    {
        if ( ord ($output{$valueLen - $i - 1}) != $padSize )
            $output = "";
    }
    $output = substr ($output, 0, $valueLen - $padSize) ;

    return base64_decode($output);        
}