Get weeks from a range

gistfile1.txt

<?php

    /**
     * Given two timestamps returns the Y-m-d ranges for each week within the range.
     *
     * @param   int     $start_ts   Starting timestamp
     * @param   int     $end_ts     Ending timestamp
     * @param   bool    $full_weeks If true, full weeks will be returned meaning
     *                              the start and end will be adjusted to create full weeks
     * @return  array
     *
     * @test
     * $mydates = DateFormat::get_week_ranges(strtotime("2011-11-01"), strtotime("2011-11-14"));
     * echo json_encode($mydates);
     * echo "\n";
     * $mydates = DateFormat::get_week_ranges(strtotime("2011-11-01"), strtotime("2011-11-14"), false);
     * echo json_encode($mydates);
     * @expects
     * [["2011-10-30","2011-11-05"],["2011-11-06","2011-11-12"],["2011-11-13","2011-11-19"]]
     * [["2011-11-01","2011-11-05"],["2011-11-06","2011-11-12"],["2011-11-13","2011-11-14"]]
     * @end
     *
     */
    public static function get_week_ranges($start_ts, $end_ts, $full_weeks = true) {

        // normalize times to noon
        $start_ts = strtotime(date("Y-m-d", $start_ts)." 12:00:00");
        $end_ts = strtotime(date("Y-m-d", $end_ts)." 12:00:00");



        $start_week_day = date("w", $start_ts);
        if($start_week_day != 0){
            $adj_start_ts = $start_ts - (86400 * $start_week_day);
        } else {
            $adj_start_ts = $start_ts;
        }


        $end_week_day = date("w", $end_ts);
        if($end_week_day != 6){
            $adj_end_ts = $end_ts + (86400 * (6 - $end_week_day));
        } else {
            $adj_end_ts = $end_ts;
        }

        $ranges = self::get_date_ranges($adj_start_ts, $adj_end_ts, 7);

        if(!$full_weeks){

            $start_date = date("Y-m-d", $start_ts);

            if($ranges[0][0] < $start_date){
                $ranges[0][0] = $start_date;
            }

            $max = count($ranges) - 1;

            $end_date = date("Y-m-d", $end_ts);

            if($ranges[$max][1] > $end_date){
                $ranges[$max][1] = $end_date;
            }

        }

        return $ranges;

    }

    /**
     * Given two timestamps and a integer, returns the Y-m-d range, separated by days
     * of that integer
     *
     * @param   int     $start_ts   Starting timestamp
     * @param   int     $end_ts     Ending timestamp
     * @return  array
     *
     * @test
     * $mydates = DateFormat::get_date_ranges(strtotime("2010-11-01"),strtotime("2010-11-14"),7);
     * echo json_encode($mydates);
     * @expects
     * [["2010-11-01","2010-11-07"],["2010-11-08","2010-11-14"]]
     * @end
     *
     */
    public static function get_date_ranges($start_ts, $end_ts, $days_per_range) {

        $date_ranges = array();

        // normalize times to noon
        $start_ts = strtotime(date("Y-m-d", $start_ts)." 12:00:00");
        $end_ts = strtotime(date("Y-m-d", $end_ts)." 12:00:00");

        $days = $days_per_range - 1;

        for($real_start_ts = $start_ts; $real_start_ts <= $end_ts; $real_start_ts += (86400 * $days_per_range)) {
            $real_end_ts = strtotime(date("Y-m-d", $real_start_ts) . " 12:00:00 + $days days");
            if($real_end_ts - $end_ts >= 0) {
                $real_end_ts = $end_ts;
            }

            $date_ranges[] = array(date("Y-m-d", $real_start_ts), date("Y-m-d", $real_end_ts));
        }

        return $date_ranges;
    }
?>