PHP文件上传效能 - 多文件上传
PHP文件上传功能 -- 多文件上传
这一节内容主要介绍PHP上传文件的多文件上传功能。
只要以数组形式来命名表单中的文件上传标记,即可实现多个文件同时上传。
下面我们来看一个例子:
---------------------------------------------------------------------
function upload($file_error, $file_tmp_name, $file_name){
$info = "";
if($file_name == "")
return $info;
switch($file_error){
case UPLOAD_ERR_INI_SIZE:
$info = $file_name. ": 文件大小超过了服务器的限制";
break;
case UPLOAD_ERR_FORM_SIZE:
$info = $file_name. ": 文件大小超过了浏览器的限制";
break;
case UPLOAD_ERR_PARTIAL:
$info = $file_name. ": 只上传了部分文件";
break;
case UPLOAD_ERR_NO_FILE:
$info = $file_name. ": 没有文件被上传";
break;
case UPLOAD_ERR_NO_TMP_DIR:
$info = $file_name. ": 找不到临时文件夹";
break;
case UPLOAD_ERR_CANT_WRITE:
$info = $file_name. ": 文件写入失败";
break;
case UPLOAD_ERR_OK:
$upload_dir = './'.iconv("UTF-8","gb2312",$file_name);
if(file_exists($upload_dir)){
$info = $file_name.": 同名文件已经存在";
}else{
if(move_uploaded_file($file_tmp_name,$upload_dir)){
$info = $file_name.": 文件上传成功";
}else{
$info = $file_name.": 文件上传失败";
}
}
break;
}
return $info;
}
if(isset($_POST['submit'])){
$info = '';
$count = count($_FILES['upload_file']['name']);
for($i=0; $i if($_FILES['upload_file']['name'][$i] == "")
continue;
$info = upload(
$_FILES['upload_file']['error'][$i],
$_FILES['upload_file']['tmp_name'][$i],
$_FILES['upload_file']['name'][$i]
);
}
echo $info;
}
?>
--------------------------------------------------------------------------------------
代码执行结果如下:

注意:
1、中, name="upload_file[]"一定要以数组形式命名,不然就会出现错误: “Uninitialized string offset: 0”,这句话的意思是你的数组key值越界了
2、$_FILES['upload_file']['name'][$i]中, upload_file是表单中上传文件标记符的名称,多文件上传时,数组$_FILES的第三维下标会自动从0开始依次编号。

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