下载文件到本地

function saveImage($path) {

    if(!preg_match('/\/([^\/]+\.[a-z]{3,4})+\?.*?$/i',$path,$matches))

        die('Use image please');

    $image_name = strToLower($matches[1]);

    $img = file_get_contents($path);

    $fp = fopen($image_name,'w');

    fwrite($fp, $img);

    fclose($fp);

    //unlink($image_name);

}

saveImage('http://img.v2.shunliandev.com/uploads/20200415/20200415141847617v.png?w=750&h=350');