根据网页地址查看所有的图片信息

        $url = "https://www.xiaolutg.com";
        $arr = @file_get_contents($url);
        preg_match_all("/<img.*src\s*=\s*[\"|\']?\s*([^>\"\'\s*]*)/i", $arr , $matches);
        echo "<pre>";
        echo $matches;
        echo "</pre>";