This article mainly introduces the sample code for file downloading in PHP. Has very good reference value. Let’s take a look with the editor below
Without further ado, please look at the code:
<?php
/**
*
*参数说明：
*
* $file_name 文件名（中英文）
* $_SERVER['DOCUMENT_ROOT'] 获取apache所在路径
*
*/
function download($file_name){
//对中文文件名进行转码
$file_name=iconv("UTF-8","GB2312",$file_name);
//文件绝对路径：E:/wamp/www."/Demo/Object/DownfileSource/".qq.txt
$filepath = $_SERVER['DOCUMENT_ROOT']."/Demo/Object/DownfileSource/".$file_name;
if(!file_exists($filepath)){ //检查文件是否存在
echo "该文件不存在！";
return;
}
$fp = fopen($filepath, 'r'); //打开文件
$file_size = filesize($filepath); //计算文件大小
if ($file_size>1) {
echo "<script>window.alert('文件过大，您没权限下载')</script>";
return;
}
//HTTP头部信息
header("Content-type: application/octet-stream");
header("Accept-Ranges: bytes");
header("Accept-Length: ".$file_size);
header("Content-Disposition: attachment; filename=".$file_name);
//输出文件内容 echo fread($fp, $file_size);
$buffer = 1024;
//为了下载安全，做一个文件字节读取计数器
$file_count = 0;
//判断文件是否结束 feof
while (!feof($fp) && ($file_size-$file_count > 0)) {
$file_data = fread($fp, $buffer); //统计读了多少字节
$file_count+=$buffer;
echo "$file_data"; //把数据会送给浏览器
}
fclose($fp);
}
//调用
download("qq.txt"); //只需填写文件名即可
?>
above That’s the entire content of this article, I hope it will be helpful to everyone’s study.
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