请选择要上传的文件：
";
print_r($_FILES);
echo "
";
$name=$_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){
case 1:
$mesErr="超过了配置文件设定的大小！";
break;
case 2:
$mesErr="超过了POST缓存的最大值！";
break;
case 3:
$mesErr="只有部分文件被上传！";
break;
case 4:
$mesErr="没有文件被上传！";
break;
case 5:
$mesErr="上传文件大小为0！";
break;
case 6:
case 7:
case 8:
$mesErr="未知错误！！！";
break;
default:
$mesErr="上传失败！";
break;
}
alertErr($mesErr);
}
//Java警告
function alertErr($mesErr){
echo "
alert('{$mesErr}')";
}
网站题目：上传文件函数的思路
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