How PHP gets the last day of a month

This article mainly introduces PHP to obtain a month maximum number of days (the last day) method, involving the PHP process control and mathematical operations related skills, with a certain reference value, the need for friends can refer to the next

This example describes how PHP gets the maximum number of days in a month (the last day). Share to everyone for your reference. Specific as follows:

Gets the maximum number of days of a month (last day) function Getmonthlastday ($month, $year) {switch ($month) {case  4: Case  6: Case  9:  Case one:   $days =;   break;  Case 2:   if ($year% 4 = = 0) {    if ($year% = = 0) {     $days = $year% = = 0? 29:28;    } else {     $days =;    }   } else {    $days =;   }   break;  Default:   $days =;   Break } return $days;}