Table of Contents
下载功能
包装成函数
批量下载
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PHP教程:在线下载文件

Jun 06, 2016 pm 08:09 PM
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我们平时呢,免不了要接触的软件之一下载工具:因为下载工具可以帮助我们更好地,更快地获取到我们需要的资源哦——迅雷、快车、旋风等工具还有很贴心的一个批量下载功能。但是,如果我们的电脑一时没有安装下载工具,而又偏偏想在不安装软件的情况下完成批

我们平时呢,免不了要接触的软件之一下载工具:因为下载工具可以帮助我们更好地,更快地获取到我们需要的资源哦——迅雷、快车、旋风等工具还有很贴心的一个批量下载功能。但是,如果我们的电脑一时没有安装下载工具,而又偏偏想在不安装软件的情况下完成批量下载,那我们应该怎么办呢。很显然地,我们可以通过DIY一个在线下载工具来批量下载我们的资源哦。(这个例子以PHP为例子,请大家注意哦)

下载功能

<?php ? ??
//设置超时 ??
set_time_limit(0);? ??
//文件地址 ??
$url?=?'http://somsite.com/some_video.flv';? ??
//获取文件信息 ??
$pi?=?pathinfo($url);? ??
$ext?=?$pi['extension'];? ??
$name?=?$pi['filename'];? ??
//创建CURL请求 ??
$ch?=?curl_init(); ??
//设置CURL ??
curl_setopt($ch,?CURLOPT_URL,?$url);? ??
curl_setopt($ch,?CURLOPT_HEADER,?false);? ??
curl_setopt($ch,?CURLOPT_BINARYTRANSFER,?true);? ??
curl_setopt($ch,?CURLOPT_AUTOREFERER,?true);? ??
curl_setopt($ch,?CURLOPT_FOLLOWLOCATION,?true);? ??
curl_setopt($ch,?CURLOPT_RETURNTRANSFER,?true);? ??
//抓取文件? ??
$opt?=?curl_exec($ch);? ??
//关闭CURL请求 ??
curl_close($ch);? ??
//文件名(包含扩展名) ??
$saveFile?=?$name.'.'.$ext;? ??
//检查文件名是否只有英文或者数字 ??
if(preg_match("/[^0-9a-z\.\_\-]/i",?$saveFile)) ??
????//把当前时间转换成MD5加密字符?作为文件名? ??
????$saveFile?=?md5(microtime(true)).'.'.$ext;? ??
//打开文件?如果没有就自行创建 ??
$handle?=?fopen($saveFile,?'wb');? ??
//把数据流写入文件 ??
fwrite($handle,?$opt);? ??
//关闭文件 ??
fclose($handle);? ??
?>??
Copy after login

包装成函数

<?php ? ??
function?downfile($url){ ??
$pi?=?pathinfo($url);? ??
$ext?=?$pi['extension'];? ??
$name?=?$pi['filename'];? ??
$ch?=?curl_init(); ??
curl_setopt($ch,?CURLOPT_URL,?$url);? ??
curl_setopt($ch,?CURLOPT_HEADER,?false);? ??
curl_setopt($ch,?CURLOPT_BINARYTRANSFER,?true);? ??
curl_setopt($ch,?CURLOPT_AUTOREFERER,?true);? ??
curl_setopt($ch,?CURLOPT_FOLLOWLOCATION,?true);? ??
curl_setopt($ch,?CURLOPT_RETURNTRANSFER,?true);? ??
$opt?=?curl_exec($ch);? ??
curl_close($ch);? ??
$saveFile?=?$name.'.'.$ext;? ??
if(preg_match("/[^0-9a-z\.\_\-]/i",?$saveFile)) ??
????$saveFile?=?md5(microtime(true)).'.'.$ext;? ??
$handle?=?fopen($saveFile,?'wb'); ??
fwrite($handle,?$opt);? ??
fclose($handle);? ??
} ??
?>??
Copy after login

批量下载

<?php ? ??
$filesArray=( ??
'http://www.itluren.com/1.jpg', ??
'http://www.itluren.com/2.jpg', ??
'http://www.itluren.com/2.flv', ??
'http://www.itluren.com/2.pdf' ??
); ??
foreach($filesArray?as?$file): ??
set_time_limit(0);? ??
downfile($file); ??
endforeach; ??
?>??
Copy after login

值得我们注意的是,这些文件链接都必须是可以直接连接的,如果设置了防盗链,我们也可以通过CURL设置来设置假的请求来源,从而顺利完成下载。更多的方式或者扩展,大家可以自己试试,欢迎与我交流哦

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