Question

for ($y = 25; $y >= 7; $y--)
{
    $showYear = false;
    for ($m = 12; $m >= 1; $m--)
    {
        if (blogList($m, $y))
            $showYear = true;
    }
    if ($showYear) {
        echo '<h2>' . (2000 + $y) . '</h2>';
        for ($m = 12; $m >= 1; $m--)
        {
            echo blogList($m, $y);
        }
    }
}

//blog archives

function blogList($month, $year) 
{
    $lastDate = array(31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

    $beginDate = mkTime(0, 0, 0, $month, 1, $year);
    $endDate = mkTime(0, 0, 0, $month, $lastDate[$month - 1], $year);


    $query = .......;
}

1. i don’t know why he set the $y=25.$showYear = false;
2. why the $lastDate = array(31,29,31,30,31,30,31,31,30,31,30,31);?

Answer 1

1. $y = 25 is because he’s looping backwards from 2025 to 2007. $y ends up as the year argument for mkTime (see http://php.net/manual/en/function.mktime.php).

2. that array holds the last date of each calendar month, e.g. January has 31 days.