How to download images in PHP-PHP Tutorial-php.cn

How to download images in PHP

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Release： 2023-03-24 22:54:02

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This article introduces the method of downloading images with PHP. It has a certain reference value. Now I share it with you. Friends in need can refer to it

Recommended Manual: php complete self-study manual

1.PHPProvide methods for downloading images

download.php code

<?php
//获取要下载的文件名
$filename = $_GET[&#39;filename&#39;];
//设置头信息
header(&#39;Content-Disposition:attachment;filename=&#39; . basename($filename));
header(&#39;Content-Length:&#39; . filesize($filename));
//读取文件并写入到输出缓冲
readfile($filename);

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Html call

<a href="download.php?filename=./files/751c77c09d8e530520aab74234495f11.jpg">下载图片</a>

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2. 3 methods for PHP to download remote images

This article demonstrates three methods of downloading images from remote URLs and saving them to local files, including file_get_contents, curl and fopen.
##

//1. 使用file_get_contents
function dlfile($file_url, $save_to)
{
$content = file_get_contents($file_url);
file_put_contents($save_to, $content);
}
//2.使用CURL
function dlfile($file_url, $save_to)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_POST, 0); 
curl_setopt($ch,CURLOPT_URL,$file_url); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
$file_content = curl_exec($ch);
curl_close($ch);
$downloaded_file = fopen($save_to, &#39;w&#39;);
fwrite($downloaded_file, $file_content);
fclose($downloaded_file);
}
//3.使用fopen
function dlfile($file_url, $save_to)
{
$in=    fopen($file_url, "rb");
$out=   fopen($save_to, "wb");
while ($chunk = fread($in,8192))
{
fwrite($out, $chunk, 8192);
}
fclose($in);
fclose($out);
}

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