PHP goto特性使用及心得与本周与其他周日期获取

今天终于在项目中用到了goto特性

foreach ($coursewares as $key => $courseware) {

        st:
        $this_time = $new_times_tmp->where('c', $c)->first();
        if (!$this_time) {
            $c = $c + 1;
            $this_time = $new_times_tmp->where('c', $c)->first();
        }
        $new_times_tmp->where('c', $c)->first()->c = $this_time->c + 1;
        $day = $this->num_to_week($this_time->week);
        if($c==0){
            $begin_date = date('Y-m-d',strtotime('last '.$day));
        }else{
            $begin_date = date('Y-m-d',strtotime('+'.$c.' week last '.$day));
        }
        if ($festivals->where('festival_date', $begin_date)->first()) {
            goto st;
        }
        $new_cous->push([
            'cou_id'     => $courseware->id,
            'date'       => $begin_date,
            'begin_time' => $time_collect[$key]->begin_time,
            'end_time'   => $time_collect[$key]->end_time,
        ]);
    }

st:是声明一个作用域(只能在一个函数或类方法中使用),可以理解为标记,如果需要跳转到某一作用域时可以 用goto跳转
本来php作为解释语言是从上到下解释执行,有了goto就可以从下到上 从任意位置跳任意位置执行, 实在太方便了.