隐藏iframe无刷新上传文件，iframe刷新上传文件
首先ajax不能上传文件，这误导了我有段时间，今晚睡不着就照着说明做了个无刷新上传文件
其实原理很简单
<form enctype="multipart/form-data" method="POST" target="upload" action="http://localhost/class.upload.php" ><br> <input type="file" name="uploadfile" /><br> <input type="submit" /> <br></form><br><iframe name="upload"><img src="http://www.bkjia.com/uploads/allimg/160303/1A0226225-0.gif" alt="复制代码">
<pre class="code">class upload<br>{<br> public $_file;<br><br> public function __construct( $name =null)<br> {<br> if(is_null($name) || !isset($_FILES[$name]))<br> $name = key($_FILES);<br> <br> if(!isset($_FILES[$name]))<br> throw new Exception("并没有文件上传");<br> <br> $this->_file = $_FILES[$name];<br> <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> }
}
调用示例：
$inputName = 'uploadfile'; <br> // 即<input type=“file" name="uploadfile" /> 中的name值，不填也行<br>$upload = new upload($inputName);<br>$new_dir = "/www"; // 将文件移动到的路径<br>$upload->moveTo($new_dir);
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