php 文件下载失误
php 文件下载出错
写了一个 文件下载的程序
- PHP code
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->function download_file($filename){ //below to provide the download if (file_exists($filename)) { $file = fopen($filename); header('Content-Description: File Transfer'); header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename=' . basename($filename)); header('Content-Transfer-Encoding: binary'); header('Expires: 0'); header('Cache-Control: must-revalidate'); header('Pragma: public'); header('Content-Length: ' . filesize($filename) . ' bytes'); //ob_clean(); //flush(); readfile($filename); fclose($file); return true; }else{ echo("the file not exist"); return false; } //above to provide the download }
但是没有进行 下载的功能。文件在上一步已经生成了。 但是如果我将 return true改成exit 下载功能可以实现,但是文件下载之后我还要进行其他的功能。请教大神们这是怎么回事? 我看网上的下载例子也不是说需要exit才可以的
------解决方案--------------------
看你在哪调用这个函数,检查下在哪里调用的,那里是不是有问题?
------解决方案--------------------
这样呢:
- PHP code
if(download_file($filename)){ #下面的操作}else{ #错误提示}<br><font color="#e78608">------解决方案--------------------</font><br>
------解决方案--------------------
------解决方案--------------------
你那个函数return false就相当于preventDefault不会提交表单
在满足答件时,例如检查字段为非空,然后return true;页面才进行跳转,也才会调用你的action
这是表单提交常用的阻止异常提交的方法

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