Get date range between dates #PHP

date_range.php

<?php

function date_range($first, $last, $step = '+1 day', $output_format = 'Y-m-d' ) {

    $dates = array();
    $current = strtotime($first);
    $last = strtotime($last);

    while( $current <= $last ) {

        $dates[] = date($output_format, $current);
        $current = strtotime($step, $current);
    }

    return $dates;
}