The cal_days_in_month( ) function in PHP is an inbuilt function which is used to return the number of days in a month for a specific year and according to a specific calendar such as Gregorian calendar, French calendar, Jewish calendar etc.
The cal_days_in_month() function takes three parameters which are the calendar, month and year and returns the number of days according to a specified month, year and calendar.
Syntax:
cal_days_in_month($calendar, $month, $year)
Parameters: The cal_days_in_month() function in PHP accepts three parameters as described below:
- $calendar: It specifies the calendar you want to consider such as French, Gregorian, Jewish etc.
- $month: It specifies the month in the calendar you have opted.
- $year: It specifies the year in the calendar you have opted.
Return Value: It returns the number of days according to a specified month, year and calendar.
Errors And Exception:
- The cal_days-in_month function gives wrong output when the date used is before 1550.
- The cal_days-in_month function gives wrong output for dates which were before the discovery of leap year.
Examples:
Input: cal_days_in_month(CAL_JEWISH, 2, 1966); Output: 29 Explanation: February 1966 had 29 days. Input: cal_days_in_month(CAL_GREGORIAN, 2, 2004); Output: 29 Explanation: February 2004 had 29 days
Below programs illustrate the cal_days_in_month() function:
Program 1:
<?php   // Using cal_days_in_month() function to // know the number of days in february, 1966 $days = cal_days_in_month(CAL_JEWISH, 2, 1966);   echo "February 1966 had $days days.<br>";   ?> |
Output:
February 1966 had 29 days.
Program 2:
<?php   // Using cal_days_in_month() function to // know the number of days in february, 2004 $days = cal_days_in_month(CAL_GREGORIAN, 2, 2004);   echo "February 2004 had $days days";   ?> |
Output:
February 2004 had 29 days
Reference:
http://php.net/manual/en/function.cal-days-in-month.php
