MyDateAnalytics.php

<?php

/**
 * Description of MyDateAnalytics
 * Esta classe é uma ajuda ao comparar se uma data,
 * está nesse semana, semana passada, neste mês ou
 * no mês passado
 * @author marcus eduardo marcusedu7@gmail.com
 */
class MyDateAnalytics {

    private $now;
    private $startWeek;
    private $lastWeek;
    private $startLastWeek;
    private $startMonth;
    private $lastMonth;
    private $startLastMonth;

    function __construct() {
        $this->now = new \DateTime();
        $this->startWeek = new \DateTime("sunday last week");
        $this->lastWeek = new \DateTime("-7 day");
        $this->startLastWeek = new \DateTime("sunday last week");
        $this->startLastWeek->modify("-7 day");
        $this->startMonth = new \DateTime("first day of this month");
        $this->lastMonth = new \DateTime("-1 month");
        $this->startLastMonth = new \DateTime("first day of last month");
    }

    public function isThisWeek($date) {
        $dateAnal = new \DateTime($date);
        return ($dateAnal > $this->startWeek && $dateAnal < $this->now);
    }

    public function isLastWeek($date) {
        $dateAnal = new \DateTime($date);
        return ($dateAnal > $this->startLastWeek && $dateAnal < $this->lastWeek);
    }

    public function isThisMonth($date) {
        $dateAnal = new \DateTime($date);
        return ($dateAnal > $this->startMonth && $dateAnal < $this->now);
    }

    public function isLastMonth($date) {
        $dateAnal = new \DateTime($date);
        return ($dateAnal > $this->startLastMonth && $dateAnal < $this->lastMonth);
    }

}