DateRanger library offer an easy way to create date ranges, allowing to create your own special ranges extending DateRange or reuse the basic ones included in the library itself (Year, Month, Week or Day). This library was inspired by others like Calendr by Yohan Giarelli or Period by The PHP League

DateRanger is available on packagist, so you can easily install with Composer.

Just run the following command:

$ composer require obokaman/dateranger

or include the library in your project's composer.json:

    "require": {
        "php": ">=7.2",
        [...]
        "obokaman/dateranger": "^0.1",
        [...]
    },

<?php

include('vendor/autoload.php');

use DateRanger\Period\Year;

$year = new Year();

echo "<h1>{$year->start()->format('Y')}</h1>";
foreach ($year as $month) {
    echo "<table><caption>{$month->start()->format('F')}</caption>";
    echo "<thead><tr><th></th><th>Mon</th><th>Tue</th><th>Wed</th><th>Thu</th><th>Fri</th><th>Sat</th><th>Sun</th></tr></thead><tbody>";
    foreach ($month as $week) {
        echo "<tr><td><small>{$week->start()->format('W')}</small></td>";
        foreach ($week as $day) {
            if (!$day->overlaps($month)) $day_color = '#ddd;';
            elseif ($day->isHoliday()) $day_color = 'red;';
            else $day_color = '#333';

            echo "<td style='border:1px solid #ccc;color:{$day_color}'>";
            echo $day->start()->format('d') . '</td>';
        }
        echo '</tr>';
    }
    echo '</tbody></table>';
}

Library provides several date range objects that extends from DateRange. All these objects share some functionality:

• start() return a DateTimeImmutable object with the start date for the period.
• end() return a DateTimeImmutable object with the end date for the period.
• getPeriod(string $interval) returns a DatePeriod object based on the current DateRange, following the given interval in string format (same values accepted by DateInterval constructor).
• overlaps(DateRange $period) returns a boolean indicating if period overlaps with other DateRange passed as argument.
• isCurrent() returns a boolean indicating if period is the current one: current year, month, week or day, depending on the class being used.
• equals(DateRange $period) compares start and end dates between current period and the one passed as argument.

As told above, all date range objects extend from DateRange, wich implements Iterator and Countable, so it's possible to iterate through their "children periods" directly using foreach or know how many of them are contained by using count.

For instance:

$year = Year::fromYear(2014);
echo count($year); // returns 12.

$month = new Month('2014-01-01');
echo count($month) . PHP_EOL; // returns 5 (weeks).

echo $month->start()->format('F') . PHP_EOL; // returns 'January'.
foreach ($month as $week) {
    foreach ($week as $day) {
        if ($month->isOutOfMonth($day)) continue;
        echo $day->start()->format('Y-m-d') . PHP_EOL; // returns 2014-01-01\n [...]
    }
}

Comments, feedback and PR are more than welcome!