php获得某段时间区间的时间戳并定时发信的代码

3. $y=date("Y",time());

4. $m=date("m",time());
5. $d=date("d",time());
6. $start_time = mktime(9, 0, 0, $m, $d ,$y);
7. $end_time = mktime(19, 0, 0, $m, $d ,$y);

8. $time = time();

9. if($time >= $start_time && $time {
10. // do something....
11. }

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