php面试题目

1.arr是一个二维数组,里面包含start_time,和end_time。提交的数据有req_start_time,req_end_time。请写出判断提交数据和数组里面的时间冲突的代码

$arr = [

    ['start_time' => '2018-05-28 09:00:00','start_time' => '2018-05-28 11:00:00'],

    ['start_time' => '2018-05-28 13:00:00','start_time' => '2018-05-28 11:00:00'],

];