Get range of date

get_range_date.php

    function get_date_range($first, $last,$output_format = 'Y-m-d') {
        $days           = 86400; 
        $blok_startDate = array();
        $current        = strtotime($first);
        $last           = strtotime($last);

        $numday         = round(($last - $current) / $days) +1;
        for( $d=0; $d < $numday; $d++) {
            $blok_startDate[]= '"' . date($output_format, ($current + ($d * $day))) . '"';
        }

        return $blok_startDate;
    }