PHP下载远程图片的3个方法

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, 'w');

fwrite($downloaded_file, $file_content);

fclose($downloaded_file);

}

3.使用fopen

function dlfile($file_url, $save_to)

{

$in= fopen($file_url, "rb"); //rb read as binary 二进制读取

$out= fopen($save_to, "wb");//write as binary 二进制写入

while ($chunk = fread($in,8192))

{

fwrite($out, $chunk, 8192);

}

fclose($in);

fclose($out);

}