php上传图片

<?php
// print_r($_FILES);
require_once('../dede/connect.php');
$error=$_FILES['myfile']['error'];

$filename=$_FILES['myfile']['name'];
$type=$_FILES['myfile']['type'];
$tmp_name=$_FILES['myfile']['tmp_name'];
$error=$_FILES['myfile']['error'];
$size=$_FILES['myfile']['size'];
$path="upload";
if(!file_exists($path)){
mkdir($path,0777,true);
}
$destination=$path."/".$filename;
move_uploaded_file($tmp_name,$destination);
if($error==0){
alertMes("上传图片成功","../dede/admin_index.php");
}else{
alertMes("上传图片失败","../dede/admin_index.php");
}