專案中，有些涉及到證書生成等功能，需要將日期轉換為全中文，故寫此方法

    public function dateToChinese($date)
    {
        $chineseDate = '';
        //$date = '2018-10-29'
        if (false == empty($date)) {
            $chineseArr = array('零', '一', '二', '三', '四', '五', '六', '七', '八', '九');//把數字化為中文
            $chineseTenArr = array('', '十', '二十', '三十');//十位數對應中文
            $year = date('Y', strtotime($date));
            $month = date('m', strtotime($date));
            $day = date('d', strtotime($date));
            //轉換為陣列
            $yearArr = str_split($year);
            foreach ($yearArr as $value) {
                $chineseDate .= $chineseArr[$value];
            }
            $chineseDate .= '年';
            $monthArr = str_split($month);
            //月，日去除零
            if ($monthArr[1] != 0) {
                $chineseDate .= $chineseTenArr[$monthArr[0]] . $chineseArr[$monthArr[1]] . '月';
            } else {
                $chineseDate .= $chineseTenArr[$monthArr[0]] . '月';
            }
            $dayArr = str_split($day);
            if ($dayArr[1] != 0) {
                $chineseDate .= $chineseTenArr[$dayArr[0]] . $chineseArr[$dayArr[1]] . '日';
            } else {
                $chineseDate .= $chineseTenArr[$dayArr[0]] . '日';
            }
        }
        return $chineseDate;
    }