2019-11-05-两个函数-一个报错-一个不报错

warning: undefined index

static public function frequencyStatus($index) {
        $frequency = [
            0 => '不重复',
             1 => '每天',
             2 => '每周',
            3 => '每月',
             4 => '每年'
        ];
        $text = $frequency[$index];
        return $text;
    }

ok

static public function frequencyStatus($index) {
        switch($index) {
            case 0:
                $text = '不重复';break;
            case 1:
                $text = '每天';break;
            case 2:
                $text = '每周';break;
            case 3:
                $text = '每月';break;
            case 4:
                $text = '每年';break;
        }
        return $text;
        // $frequency = [
        //     0 => '不重复',
        //     1 => '每天',
        //     2 => '每周',
        //     3 => '每月',
        //     4 => '每年'
        // ];

        // $text = $frequency[$index];
        // return $text;
    }