PHP上传多文件、多图片的示例代码

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<?php    
 $uptypes=array( 
//上传文件的ContentType格式 
        'image/jpg', 
        'image/jpeg', 
        'image/png', 
        'image/pjpeg', 
        'image/gif', 
        'image/bmp', 
        'image/x-png', 
        'application/msword',//doc 
        'application/vnd.openxmlformats-officedocument.wordprocessingml.document',//docx 
        'application/vnd.openxmlformats-officedocument.presentationml.presentation',//pptx  
        'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',//xlsx 
        'text/plain' 
                ); 
/**
* php多文件、多图片上传
* by www.jbxue.com
*/
$max_file_size=2000000; //上传文件大小限制, 单位BYTE 
$dir="upload/"; //上传文件路径 
if ($_SERVER['REQUEST_METHOD'] == 'POST') 
{ 
   $file = $_FILES['upfile']['name']; 
   foreach($file as $key=>$item){ 
   if($item != ''){ 
         if (!is_uploaded_file($_FILES['upfile']['tmp_name'][$key]))//是否存在文件 
         { 
            echo "图片不存在!";   
            exit; 
         } 
        if($max_file_size < $_FILES['upfile']['size'][$key])//检查文件大小 
        { 
            echo "文件太大!"; 
            exit; 
        } 
   if(!file_exists($dir)) 
       { 
          mkdir($dir); 
       } 
    $filename=$_FILES['upfile']['tmp_name'][$key]; 
    $image_size = getimagesize($filename); 
    $pinfo = pathinfo($file[$key]); 
 
    $ftype = $pinfo['extension']; 
    $destination = $dir.time().$file[$key]; 
    if (file_exists($destination) && $overwrite != true) 
    { 
        echo "同名文件已经存在了"; 
        exit; 
    } 
 
    if(!move_uploaded_file ($filename, $destination)) 
    { 
        echo "移动文件出错"; 
        exit; 
    } 
    $pinfo=pathinfo($destination); 
    $fname=$pinfo['basename']; 
    echo " <font color=red>已经成功上传</font><br>文件名:  <font color=blue>".$dir.$fname."</font><br>"; 
    echo " 宽度:".$image_size[0]; 
    echo " 长度:".$image_size[1]; 
    echo "<br> 大小:".$_FILES['upfile']['size']." bytes"; 
 
}                
 
    echo "<br>图片预览:<br>"; 
    echo "<img src=\"".$destination."\" width=".($image_size[0]*(1/4))." height=".($image_size[1]*(1/4)); 
    echo " alt=\"图片预览:\r文件名:".$destination."\r上传时间:\">"; 
    echo "<br>"; 
        } 
    } 
 
 ?> 
<form method="post" enctype="multipart/form-data" action="" name="ff" id="ff" > 
    <input type="file" name="upfile[]" /> 
    <input type="file" name="upfile[]" /> 
    <label> 
      <input type="submit" name="submit" id="submit" value="按钮"/> 
    </label> 
 </form>