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run code in 200+ php & hhvm versions
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<?php $array = array('Month' => 07, 'Year' => 2014); $daysCount = cal_days_in_month(CAL_GREGORIAN, $array['Month'], $array['Year']); //obtain month days count $firstDay = mktime(0, 0, 0, $array['Month'], 1, $array['Year']); //obtain timestamp of specified month first day $lastDay = mktime(0, 0, 0, $array['Month'], $daysCount, $array['Year']); //obtain timestamp of specified month last day echo 'First: '.$firstDay.' Last: '.$lastDay; ?>
Output for 4.3.0 - 7.2.0
First: 1404165600 Last: 1406757600