时间：2021-07-01 10:21:17 帮助过：10人阅读
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
<img src="http://www.bkjia.com/uploads/allimg/160303/1A0226225-0.gif" alt="" /></span> <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 $real_dir;<br /> }</pre> <pre class="code">}</pre> <span class="cnblogs_code_copy"><img src="http://www.bkjia.com/uploads/allimg/160303/1A0226225-0.gif" alt="" /></span> <p>调用示例：</p> <pre class="code">$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);</pre> <p> </p></p> <p align="left"><span id="url" itemprop="url">http://www.bkjia.com/PHPjc/1105144.html</span><span id="indexUrl" itemprop="indexUrl">www.bkjia.com</span><span id="isOriginal" itemprop="isOriginal">true</span><span id="isBasedOnUrl" itemprop="isBasedOnUrl">http://www.bkjia.com/PHPjc/1105144.html</span><span id="genre" itemprop="genre">TechArticle</span><span id="description" itemprop="description">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...</span></p> </div> <div class=""> <ul class="m-news-opt 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