Online PHP editor | output for Cb8qb

@ 2014-07-01T17:12:10Z

<?php
$month = 2; //date("n");
    $day = 16; //date("j");
    $year = 2014; //date("Y");

if ($day > 15) {
    $day = 1;
} else {
    if ($month == 1) {
		$month = 12;
        $year--;
        $day = 16;
    } else {
    	$month--; 
    	$day = 16;
    }
	$daysinmonth = date("t", strtotime("$year - $month - $day"));
}


//$rangeEnd = date("Y-m-d 23:59:59", strtotime("last month"));
//$rangeStart = date("Y-m-d 00:00:00", strtotime($rangeEnd." -6 days"));

	echo "$year $month $day    $daysinmonth";

?>

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Warning: Undefined variable $daysinmonth in /in/Cb8qb on line 24 2014 2 1
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33: Notice: Undefined variable: daysinmonth in /in/Cb8qb on line 24 2014 2 1
Output for 7.3.32 - 7.3.33: 2014 2 1
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3: Notice: Undefined variable: daysinmonth in /in/Cb8qb on line 24 2014 2 1

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