php download function
This is the beginning of the code of the xx.php file
<?php
//文件下载的封装(超链接的方式)
function down_file($filename,$allowDownExt=array('zip','html','rar')){
if(!is_file($filename)||!is_readable($filename)){
return false;
}
$ext=strtolower(pathinfo($filename,PATHINFO_EXTENSION));
if(!in_array($ext, $allowDownExt)){
return false;
}
//发送请求头,告诉浏览器输出的是字节流
header('content-type:application/octet-stream');
//告诉浏览器文件是按照字节来计算的
header('Accept-Ranges:bytes');
//告诉浏览器文件的大小
header('Accept-Length:'.filesize($filename));
//告诉浏览器文件是按附件处理，并且告诉浏览器下载的文件的名称
header('Content-Disposition:attachment;filename='.basename($filename));
//读取文件的内容
readfile($filename);
exit;
}
?>This is the end of the code of the xx.php file
This is the beginning of the code of the index.html file
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <a href="http://localhost:8081/download.php?filename=5.html">下载5.html</a> </body> </html>
This is the end of the code of the index.html file
This is the beginning of the code of the download.php file
<?php require_once('xx.php'); $filename=$_GET['filename']; down_file($filename); ?>
This is download. The code of the php file ends
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