Online PHP editor | output for N5tr1

@ 2014-07-28T07:43:36Z

<?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 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Uncaught Error: Call to undefined function cal_days_in_month() in /in/N5tr1:4 Stack trace: #0 {main} thrown in /in/N5tr1 on line 4
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40: Fatal error: Call to undefined function cal_days_in_month() in /in/N5tr1 on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: First: 1404165600 Last: 1406757600

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