Online PHP editor | rfc for KGYN5

@ 2013-11-18T22:04:54Z

<?php

function nextMonth($date, $increment)
{
    $firstOfDateMonth = \DateTime::createFromFormat('Y-m-d', $date)->modify('first day of this month');
    $thirtyFirstOfDateMonth = \DateTime::createFromFormat('Y-m-d', $date)->modify('last day of this month');
    $thirtyFirstOfDateMonthNum = $thirtyFirstOfDateMonth->format('d');

    $thirtyFirstOfNextMonth = clone $firstOfDateMonth;
    $thirtyFirstOfNextMonth->modify('+' . (int) $increment . ' month')->modify('last day of this month');
    $thirtyFirstOfNextMonthNum = $thirtyFirstOfNextMonth->format('d');

    $dayOfDateMonth = \DateTime::createFromFormat('Y-m-d', $date);
    $dayOfDateMonthNum = $dayOfDateMonth->format('d');

    $dt = \DateTime::createFromFormat('Y-m-d', $date);
    $dt->modify('+' . (int) $increment . ' month');
    if ($thirtyFirstOfNextMonthNum < $thirtyFirstOfDateMonthNum && $thirtyFirstOfNextMonthNum < $dayOfDateMonthNum) {
		$dt = clone $thirtyFirstOfNextMonth;
    }

    return $dt->format('Y-m-d');
}

echo nextMonth('2009-12-31', 2),"\n";
echo nextMonth('2010-01-31', 1),"\n";
echo nextMonth('2010-01-05', 1),"\n";
echo nextMonth('2010-12-05', 1),"\n";
echo nextMonth('2010-02-28', 1),"\n";

Output for git.master, git.master_jit, rfc.property-hooks: 2010-02-28 2010-02-28 2010-02-05 2011-01-05 2010-03-28

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