Hide iframe and upload files without refreshing

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.

It is similar to the general

tag. There is just one more target attribute, which is used to specify where the tab page should be opened and data submitted.

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

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, so there will be no movement. If you remove display:none, you will also see the return information from the server.

Also post the categories of your own organization.

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

}

Call example:

$inputName =  'uploadfile'; <br> // 即<input type='“file"' name="uploadfile"> 中的name值，不填也行<br>$upload = new upload($inputName);<br>$new_dir = "/www";  // 将文件移动到的路径<br>$upload->moveTo($new_dir);

The above introduces the hidden iframe upload file without refreshing, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.