<formaction=""method="post"enctype="multipart/form-data">请选择要上传的文件：<inputtype="file"name="myFile"value=""/>　　　<inputtype="submit"value="开始上传"/></form><?phpheader("content-type:text/html;charset=utf-8");echo"<pre>";print_r($_FILES);echo"</pre><hr/>";$name=$_FILES['myFile']['name'];$type=$_FILES['myFile']['type'];$tmp_name=$_FILES['myFile']['tmp_name'];$error=$_FILES['myFile']['error'];$size=$_FILES['myFile']['size'];if($error==UPLOAD_ERR_OK){if(is_uploaded_file($tmp_name)){@$ext=strtolower(end(explode(".",$name)));$extArray=array("jpeg","png","gif","jpg","txt");if(in_array($ext,$extArray)&&substr($type,0,5)=='p_w_picpath'){//in_array函数是区分大小写的$uniqueName=md5(uniqid(microtime(true),true));$dir="p_w_picpaths";$destination=$dir."/".$uniqueName.".".$ext;if(move_uploaded_file($tmp_name,$destination)){$mesErr="上传成功";}else{$mesErr="上传失败";}}else{$mesErr="不支持文件类型，请重新选择文件上传";}}else{$mesErr="非法上传方式";}alertErr($mesErr);}else{//echo$error;switch($error){case1:$mesErr="超过了配置文件设定的大小！";break;case2:$mesErr="超过了POST缓存的最大值！";break;case3:$mesErr="只有部分文件被上传！";break;case4:$mesErr="没有文件被上传！";break;case5:$mesErr="上传文件大小为0！";break;case6:case7:case8:$mesErr="未知错误！！！";break;default:$mesErr="上传失败！";break;}alertErr($mesErr);}//Java警告functionalertErr($mesErr){echo"<scripttype='text/javascript'>alert('{$mesErr}')</script>";}