Detailed explanation of several methods for downloading remote images with PHP

This article mainly introduces the relevant information summarized by several methods of downloading remote pictures in PHP. Friends in need can refer to the following

Summary of several methods of downloading remote pictures in PHP

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. Use file_get_contents

function dlfile($file_url, $save_to)
{
 $content = file_get_contents($file_url);
 file_put_contents($save_to, $content);
}

2. Use 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, 'w');
 fwrite($downloaded_file, $file_content);
 fclose($downloaded_file);
}

3. Use 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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