php 图片上传代码例子

if($_FILES['file']){

 // 上传设置
 $maxsize=10002400;            //最大允许上传的文件大小
 $alltype=array(".jpg",".JPG",".GIF",".gif",".png",".swf");         //所有允许上传的文件类型
 $imgtype=array(".jpg",".JPG",".GIF",".gif",".png",".swf");               //图片类型

 // 判断文件大小
 if($_FILES['file']['size']>$maxsize)  {
     echo "您上传的资料大于10000K";
     exit;
 }
 
 // 判断文件类型
 $type=strstr($_FILES['file']['name'],".");
 if(!in_array($type,$alltype)){
     echo "不允许上传该类型的文件";
     exit;
 }
 $updir="uploaddir";
 $time=date("Ymd-His",time());
 $fn=$time.$type;
 $destination=$updir."/".$fn;
 if(@move_uploaded_file($_FILES['file']['tmp_name'], $destination)){
         @chmod($destination, 0777);
   $fileurl=$updir."/".$destination;
         $fileurl="".$destination;
          
 }else{
    echo "上传失败!";
    echo "<script>location.href=history.back()</script>";
 }
// ----------------------------------------------------------------------------------------------//
}
if($back=="no"):
 echo "ok";
 exit;
endif;