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php+iframe实现隐藏无刷新上传文件示例 - 站长搜索
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php+iframe实现隐藏无刷新上传文件示例

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2014-12-19 02:15:12 转载来源: 网络整理/侵权必删

本文是一个php+iframe实现隐藏无刷新上传文件示例代码,感兴趣的同学参考下. 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" > <input type="file" name="uploadfile" /> <input type="submit" /> </form> <iframe name="upload" style="display:none"></iframe> 和一般的<form>标签相比多了

本文是一个php+iframe实现隐藏刷新上传文件示例代码,感兴趣的同学参考下.


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" >
<input type="file" name="uploadfile" />
<input type="submit" />
</form>
<iframe name="upload" style="display:none"></iframe>


和一般的<form>标签相比多了一个target属性罢了,用于指定标签页在哪里打开以及提交数据。

如果没有设置该属性,就会像平常一样在本页重定向打开action中的url。

而如果设置为iframe的name值,即"upload"的话,就会在该iframe内打开,因为CSS设置为隐藏,因而不会有任何动静。若将display:none去掉,还会看到服务器的返回信息。

另外贴一下自己组织的类。

 


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;
}}


调用示例:

 


$inputName = 'uploadfile';
// 即<input type=“file" name="uploadfile" /> 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);

 


标签: php+iframe 实现 隐藏 刷新 上传 文件 示例


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