PHP iframe implements refresh-free file upload (no ajax required)_PHP tutorial

This article will introduce the method of uploading files. One method uses php iframe to achieve uploading without refreshing. Students in need can refer to it.

First of all, ajax cannot upload files, which misled me for a while. I couldn’t sleep tonight, so I followed the instructions and uploaded files without refreshing

In fact, the principle is very simple

The code is as follows

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代码如下	复制代码

   
         

Compared with the general

tag, it only has one more target attribute, which is used to specify the label page. Where to open and submit data.

If this attribute is not set, the URL in the action will be redirected and opened on this page as usual.

代码如下

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class upload {    public $_file;    public function __construct( $name =null)    {        if(is_null($name) || !isset($_FILES[$name]))             $name = key($_FILES);                    if(!isset($_FILES[$name]))            throw new Exception("并没有文件上传");                   $this->_file  = $_FILES[$name];               if(!is_uploaded_file($this->_file['tmp_name']))             throw new Exception("异常情况");        if($this->_file['error'] !== 0)             throw new Exception("错误代码:".$this->_file['error']);        }    public function moveTo( $new_dir)    {        $real_dir = $this->checkDir($new_dir);        return move_uploaded_file($this->_file['tmp_name'], $real_dir.'/'.$this->_file['name']);    }    private function checkDir($dir)    {        $real_dir = realpath($dir);        if($real_dir === false)            throw new Exception("给定目录{$dir}不存在");        if(!is_writable($real_dir))            throw new Exception("给定目录{$dir}不可写");        return $real_dir;    } }

And if it is set to the name value of the iframe, that is, "upload", it will be opened in the iframe. Because the CSS is set to hidden, there will be no movement. If you remove display:none, you will also see the return information from the server. Also post the classes you organized.

The code is as follows

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class upload{ public $_file; public function __construct( $name =null) { if(is_null($ name) || !isset($_FILES[$name])) $name = key($_FILES); if(!isset($_FILES[$name])) throw new Exception("No file uploaded");                                                                                                                                                                          tmp_name']))                                                                                                                            thanier ".$this->_file['error']); "." }" public function moveTo( $new_dir) " return move_uploaded_file($this->_file['tmp_name'], $real_dir.'/'.$this->_file['name']); } private function checkDir($ dir) { $real_dir = realpath($dir); if($real_dir === false) throw new Exception("The given directory {$dir} does not exist"); if(!is_writable($real_dir)) throw new Exception("The given directory {$dir} is not writable"); return $real_dir; }}

Call example:

The code is as follows

代码如下	复制代码
$inputName =  'uploadfile';  // 即 中的name值，不填也行 $upload = new upload($inputName); $new_dir = "/www";  // 将文件移动到的路径 $upload->moveTo($new_dir);

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$inputName = 'uploadfile';
// That is, the name value in is left blank. Also OK
$upload = new upload($inputName);
$new_dir = "/www"; // The path to move the file to
$upload->moveTo($new_dir) ;

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This article will introduce the method of file upload. One uses php iframe to achieve upload. This is also without refresh. Oh, students in need can refer to it. First of all, ajax does not...