花一小时进入时间戳

Question

How can I make a time, for example 09, to a UNIX timestamp? I tried strtotime() but unsuccessfully. strtotime("9") returns nothing.

Edit:
It's my fault that I didn't mention before but I'm trying to check if current time + 30 minutes is bigger or equal to time, saved in a mysql DB. I save time in DB as 09, for example (probably there's my mistake).

Answer 1

Try mktime

int mktime ([ int $hour = date("H") [, int $minute = date("i") [, int $second = date("s") [, int $month = date("n") [, int $day = date("j") [, int $year = date("Y") [, int $is_dst = -1 ]]]]]]] )

http://php.net/manual/en/function.mktime.php