PHP Reference
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Quick Reference

The PHP cal_days_in_month() function returns the number of days in a month for a specified year and calendar.

<?php
$d = cal_days_in_month(CAL_GREGORIAN, 2, 2023);
echo 'There were ' . $d . ' days in February 2023.';
?>

Output

There were 28 days in February 2013.

Syntax

cal_days_in_month(calendar, month, year)

Parameters

ParameterDescription
calendarSpecifies the calendar to use (required)

  • CAL_GREGORIAN

  • CAL_JULIAN

  • CAL_JEWISH

  • CAL_FRENCH

  • CAL_NUM_CALS

  • CAL_DOW_DAYNO

  • CAL_DOW_SHORT

  • CAL_DOW_LONG

  • CAL_MONTH_GREGORIAN_SHORT

  • CAL_MONTH_GREGORIAN_LONG

  • CAL_MONTH_JULIAN_SHORT

  • CAL_MONTH_JULIAN_LONG

  • CAL_MONTH_JEWISH

  • CAL_MONTH_FRENCH

  • CAL_EASTER_DEFAULT.3

  • CAL_EASTER_ROMAN.3

  • CAL_EASTER_ALWAYS_GREGORIAN.3

  • CAL_EASTER_ALWAYS_JULIAN.3

  • CAL_JEWISH_ADD_ALAFIM_GERESH

  • CAL_JEWISH_ADD_ALAFIM

  • CAL_JEWISH_ADD_GERESHAYIM
monthSpecifies the month in the selected calendar (required)
yearSpecifies the year in the selected calendar (required)

PHP Notes:

  • When using PHP, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
  • Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
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