Cal_days_in_month () function not working

Question

This cal_days_in_month() does not work in PHP version 5.2.11

 $days_in_month = cal_days_in_month(0,$month,$year); 

Answer 1

Try

 date('t', mktime(0, 0, 0, $month, 1, $year)); 

And I found on the Internet that he needed to compile PHP with calendar support.

"recompile php with the parameter" --enable-calendar ".

Answer 2

you need to provide a calendar:

 int cal_days_in_month ( int $calendar , int $month , int $year ) 

as:

 $month_length = cal_days_in_month(CAL_GREGORIAN, $month, $year); 

you can confuse it with cal_info ([ int $calendar = -1 ] ) which takes a calendar view:

 0 or CAL_GREGORIAN - Gregorian Calendar 1 or CAL_JULIAN - Julian Calendar 2 or CAL_JEWISH - Jewish Calendar 3 or CAL_FRENCH - French Revolutionary Calendar 

Answer 3

Because the syntax is:

 $days_in_month = cal_days_in_month(CALENDAR,$month,$year); 

like this:

 $days = cal_days_in_month(CAL_GREGORIAN, 2, 2012);