php Save Binary Original Data for Picture Program Code

Get the binary original data from post, select a generation path and the name of the picture, and then write it. The idea is obvious

  // Generate a picture  
  $imgDir = 'uploadImg/'; 
  $filename="nissangcj".$mobile.".jpg";/// The name of the picture to be generated  
   
  $xmlstr = $GLOBALS[HTTP_RAW_POST_DATA]; 
  if(empty($xmlstr)) { 
    $xmlstr = file_get_contents('php://input'); 
  } 
    
  $jpg = $xmlstr;// Get post Come over 2 Binary raw data  
  if(empty($jpg)) 
  { 
    echo 'nostream'; 
    exit(); 
  } 
   
  $file = fopen("./".$imgDir.$filename,"w");// Open the file for writing  
  fwrite($file,$jpg);// Write  
  fclose($file);// Shut down  
   
  $filePath = './'.$imgDir.$filename; 
   
  // Does the picture exist  
  if(!file_exists($filePath)) 
  { 
    echo 'createFail'; 
    exit(); 
  }