其它原理很简单,利用form表单的target属性和iframe来实现的,打开为iframe试就行了,返回就利用js判断php教程运行后返回的参数是不是成功
一、上传文件的一个php方法。
该方法接受一个$file参数,该参数为从客户端获取的$_files变量,返回重新命名后的文件名,如果上传失败,则返回空字符串。
php代码 function uploadfile($file) { // 上传路径 $destinationpath = "./upload/"; if (!file_exists($destinationpath)){ mkdir($destinationpath , 0777); } //重命名 $filename = date('ymdhis') . '_' . iconv('utf-8' , 'gb2312' , basename($file['name'])); if (move_uploaded_file($file['tmp_name'], $destinationpath . $filename)) { return iconv('gb2312' , 'utf-8' , $filename); } return ''; }
二、客户端html代码
这里正是技巧所在,添加另一个iframe来实现。表单标签form定义了一个属性target,该属性解释如下:
[pre]target属性:
_blank ---------- 新开窗口
_self ----------- 自身
_top ------------ 主框架
_parent --------- 父框架
自定义名字 ----- 出现于框架结构,将会在该名称的框架内打开链接
本例中采用iframe名字,所以表单在提交时会在iframe内打开链接(即无刷新,确切的说应该是
感觉无刷新)
在表单提交时,调用startupload方法,当然这是js定义的。
[/pre][pre]此外我们还定义一个span来显示提示信息。代码如下:
[/pre]xhtml代码

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