HTML5解决大文件断点续传(2)

if(isset($_POST['lastone'])){
 echo $_POST['lastone'];
 $count=$_POST['lastone'];
 
 $fp  = fopen($_POST['filename'],"abw");
 for($i=0;$i<=$count;$i++){
  $handle = fopen($dir."/".$i,"rb"); 
  fwrite($fp,fread($handle,filesize($dir."/".$i))); 
  fclose($handle);   
 }
 fclose($fp);
}
 
 
?>