if (isset($_POST[self::QUANTITY)){
		foreach ($_POST[self::QUANTITY) as $pid => $value){
			if (!$this->isInt($pid) && !$this->isValidPid($pid)){
				$this->errorMessages[self::PID] = "Please enter a valid Product ID";
			}
			if (!$this->isInt($value)){
				$this->errorMessages[self::QUANTITY . $pid] = "Please enter a valid Quantity";
			}
		}
	}
		if ((count($_this->errorMessages) !==0)) {
			foreach ($this->pageArray as $index => $cartrow) {
				foreach ($POST[self::QUANTITY] as $pid => $quantity) {
					if ($cartrow[self::QUANTITY] as $pid => $pid) {
						$this->pageArray[$index] [self::QUANTITY] = Utilities::sanitizeFilter($quantity)
					}
				}
			}
			$this->currentView->setParameter(new GenericParameter("pageArray", $this->pageArray]
		}
        return (count($this->errorMessages) === 0);
    }