##### 实例 - 自动识别格式化 ~~~ $second = '70'; $obj = $T_T -> shijian('秒数'); ~~~ ##### 实例 - 限定显示时间单位为秒 ~~~ $second = '70'; $obj = $T_T -> shijian('秒数',['unit'=>'sec']); ~~~ ##### 实例 - 限定显示时间单位为分 ~~~ $second = '70'; $obj = $T_T -> shijian('秒数',['unit'=>'min']); ~~~ ##### 实例 - 限定显示时间单位为小时 ~~~ $second = '70'; $obj = $T_T -> shijian('秒数',['unit'=>'hour']); ~~~ ##### 实例 - 限定显示时间单位为天 ~~~ $second = '70'; $obj = $T_T -> shijian('秒数',['unit'=>'day']); ~~~