How to save downloaded files in php

php method to save downloaded files: 1. Download files through the "function downfile(){...}" method; 2. Save and download through the header function.

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

php download and save the file and save it to the local Two implementation methods

The download here refers to the pop-up download prompt box.

The first method:

<?php 
function downfile()
{
 $filename=realpath("resume.html"); //文件名
 $date=date("Ymd-H:i:m");
 Header( "Content-type:  application/octet-stream "); 
 Header( "Accept-Ranges:  bytes "); 
Header( "Accept-Length: " .filesize($filename));
 header( "Content-Disposition:  attachment;  filename= {$date}.doc"); 
 echo file_get_contents($filename);
 readfile($filename); 
}
downfile();
?>

or (recommended this method, personal test is feasible, others have not been tested)

<?php 
function downfile($fileurl)
{
 ob_start(); 
 $filename=$fileurl;
 $date=date("Ymd-H:i:m");
 $size=readfile($filename);
 header( "Content-type:  application/octet-stream "); 
 header( "Accept-Ranges:  bytes "); 
 header( "Content-Disposition:  attachment;  filename= {$date}.doc"); 
 header( "Accept-Length: " .$size);
}
 $url="url地址";
 downfile($url);
?>

The second method:

<?php 
function downfile($fileurl)
{
$filename=$fileurl;
$file  =  fopen($filename, "rb"); 
Header( "Content-type:  application/octet-stream "); 
Header( "Accept-Ranges:  bytes "); 
Header( "Content-Disposition:  attachment;  filename= 4.doc"); 
$contents = "";
while (!feof($file)) {
 $contents .= fread($file, 8192);
}
echo $contents;
fclose($file); 
}
$url="url地址";
downfile($url);
?>

PHP implements two methods for downloading files. Share it so friends who may find it useful can take a look.

Method 1:

<?php
/**
* 下载文件
* header函数
*
*/
header(&#39;Content-Description: File Transfer&#39;);
 
header(&#39;Content-Type: application/octet-stream&#39;);
header(&#39;Content-Disposition: attachment; filename=&#39;.basename($filepath));
header(&#39;Content-Transfer-Encoding: binary&#39;);
header(&#39;Expires: 0′);
header(&#39;Cache-Control: must-revalidate, post-check=0, pre-check=0′);
header(&#39;Pragma: public&#39;);
header(&#39;Content-Length: &#39; . filesize($filepath));
readfile($file_path);
?>

Understand the usage of header function in php.

Method 2:

<?php
//文件下载
//readfile
$fileinfo = pathinfo($filename);
header(&#39;Content-type: application/x-&#39;.$fileinfo[&#39;extension&#39;]);
header(&#39;Content-Disposition: attachment; filename=&#39;.$fileinfo[&#39;basename&#39;]);
header(&#39;Content-Length: &#39;.filesize($filename));
readfile($thefile);
exit();
?>

Recommended learning: "PHP Video Tutorial"

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