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 ]]]]]]] ) 

説明

Returns the Unix timestamp corresponding to the arguments given. This timestamp is a long integer containing the number of seconds between the Unix Epoch (January 1 1970 00:00:00 GMT) and the time specified. Arguments may be left out in order from right to left; any arguments thus omitted will be set to the current value according to the local date and time. Note: As of PHP 5.1, when called with no arguments, mktime() throws an E_STRICT notice: use the time() function instead.

戻り値