php 运用base64一次性上传多张图片

$params = json_decode(file_get_contents('php://input'), TRUE);
$files = $params['files'];
$paths=array();
foreach ($files as $imgbase64) {
    if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $imgbase64, $result)) {
        $type = $result[2];//图片后缀
        $url = '../upload/tip/' . date("Ymd", time()) . "/";
        $new_file = $url;
        if (!file_exists($new_file)) {
            //检查是否有该文件夹，如果没有就创建，并给予最高权限
            mkdir($new_file, 0777, true);
        }

        $filename = time() . '_' . uniqid() . ".{$type}"; //文件名
        $new_file = $new_file . $filename;
        $url = $url . $filename;
        //写入操作
        $paths[]= $url;
        file_put_contents($new_file, base64_decode(str_replace($result[1], '', $imgbase64)));
    }
}
var_dump($paths);return;