缩短月份的时间戳php

Question

I need a list which iterates through the months and always shows the last days like this

2015-04-30
2015-03-31
2015-02-28
...

My idea was to do this with the strtotime method, where '1430344800' is the timestep according to 2015-04-30

$time_temp = 1430344800;
echo date('Y-m-t',$time_temp)."<br>";

$time_temp  =   strtotime("-1 month",$time_temp);
echo date('Y-m-t',$time_temp)."<br>";

$time_temp  =   strtotime("-1 month",$time_temp);
echo date('Y-m-t',$time_temp)."<br>";

but I just get

2015-04-30
2015-03-31
2015-03-31

replacing 'Y-m-t' by 'Y-m-d' gives

2015-04-30
2015-03-30
2015-03-02

Why is it not reducing the month properly and how can I accomplish it?

Answer 1

$lastDayOfMonth = time(); // depending on what you're trying to do, this could change. 
// For example, it could be = strtotime("+1 month");
for( $i = 0; $i < $numberOfMonthsToShow; $i++ ){
    $lastDayOfMonth = strtotime("last day of previous month", $lastDayOfMonth);
    echo date('Y-n-j', $lastDayOfMonth).'<br />';
}