如何使用php获取每月的最后一天

Question

I'm trying to get the last day from the month using strtotime .I don't know what wrong with the below code. Can some one shoot out the issue ?

$string = 'Jun';
$month_number = date("m",strtotime($string));
$calcstart_date = date('Y-'.$month_number.'-01').' 00:00:00';
echo $calcend_date = date('Y-'.$month_number.'-t').' 11:59:00';

Answer 1

Your last two date() calls aren't based in any way on the timestamp you computed earlier; those will just use the number of days in the current month.

You want:

$time = strtotime($string);
$calcstart_date = date('Y-m-\0\1', $time);
$calcend_date = date('Y-m-t', $time);

And if you need the month number independently you can still do

$month_number = date('m', $time);

Finally if you'd like just the last day number by itself, that would be:

$number_of_days = date('t', $time);