Code:
{ //Download images from remote server
    $in=    fopen($inPath, "rb");
    $out=   fopen($outPath, "wb");
    while ($chunk = fread($in,8192))
    {
        fwrite($out, $chunk, 8192);
    }
    fclose($in);
    fclose($out);
}
save_image('http://www.php.net/images/php.gif','image.gif');

i


function download_remote_file($file_url, $save_to)
    {

        $content = file_get_contents($file_url);

        file_put_contents($save_to, $content);
    }

download_remote_file('http://www.php.net/images/php.gif', realpath("./downloads") . '/file.gif');