function    judgeFile($file,$form){
if(!empty($file)    &&    !empty($form)){
$filehead    =    fopen($file,'r');
$bin    =    fread($filehead,    2);
fclose($filehead);
$data    =    unpack('C2chars',    $bin);
$type_code    =    intval($data['chars1'].$data['chars2']);
switch    ($type_code)    {
case    7790:    $fileType    =    'exe';break;
  case    7784:    $fileType    =    'midi';break;
  case    8075:    $fileType    =    'zip';break;
  case    8297:    $fileType    =    'rar';break;
  case    255216:    $fileType    =    'jpg';break;
  case    7173:    $fileType    =    'gif';break;
  case    6677:    $fileType    =    'bmp';break;
  case    13780:    $fileType    =    'png';break;
  default:    $fileType    =    'unknown';break;
}
if(!is_array($form)){
if($fileType==$form){
return    true;
}else{
return    false;
}
}else{
if(in_array($file,    $form)){
return    true;
}else{
return    FALSE;
}
}
}else{
return    false;
}
}