Is there a native function that identifies how many days does the month ?
Example:
value : 2018-08 , then return would be: 31 .
$dias = funcao('2018-08');
echo $dias; // resultado: 31
If there is no native function, how could you do it?
Before you ask: have the leap year (February 29th).
There is a native function of php for this, it is cal_days_in_month .
This function will return the number of days in a month of the year for the specified calendar.
int cal_days_in_month ( int $calendar , int $month , int $year )
Where:
calendar: Calendar to use in calculation
month: Month to be selected in the calendar
year: Year not selected calendar
Example:
<?php
$dias = cal_days_in_month(CAL_GREGORIAN, 8, 2018); // 31
echo "Existem ".$dias." dias em Agosto de 2018";
?>
As I replied in link I would say the best way to do this is by using a native function created for this is it:
echo cal_days_in_month(CAL_GREGORIAN, 8, 2018);
$funcao = new DateTime("2018-08");
$numDias = $funcao->format('t');
date - format parameter string
format | Descrição | Retorno
------------------------------------------------------
t | Número de dias de um dado mês | 28 até 31