<?php
/**
 * Mobile Detect - A lightweight PHP class for detecting mobile devices.
 * @author  Sergei Serban
 * @link    https://github.com/serbanghita/Mobile-Detect
 * @license MIT License
 */

class Mobile_Detect {

    /**
     * @var string The User-Agent string.
     */
    private $userAgent = '';

    /**
     * @var array Regular expressions to match devices.
     */
    private $mobileAgents = array(
        'iPhone', 'iPad', 'iPod', 'Android', 'BlackBerry', 'Windows Phone', 'webOS', 'Opera Mini', 'IEMobile'
    );

    /**
     * Constructor
     */
    public function __construct() {
        // Set the user agent if it's not already set.
        if (empty($this->userAgent)) {
            $this->userAgent = $_SERVER['HTTP_USER_AGENT'];
        }
    }

    /**
     * Check if the device is mobile.
     *
     * @return bool True if it's a mobile device, false otherwise.
     */
    public function isMobile() {
        return $this->isDevice('mobile');
    }

    /**
     * Check if the device is a tablet.
     *
     * @return bool True if it's a tablet, false otherwise.
     */
    public function isTablet() {
        return $this->isDevice('tablet');
    }

    /**
     * Check if the device is a phone.
     *
     * @return bool True if it's a phone, false otherwise.
     */
    public function isPhone() {
        return $this->isDevice('phone');
    }

    /**
     * Check if the device is of the specified type (mobile or tablet).
     *
     * @param string $type 'mobile' or 'tablet'
     * @return bool
     */
    private function isDevice($type) {
        foreach ($this->mobileAgents as $agent) {
            if (stripos($this->userAgent, $agent) !== false) {
                return true;
            }
        }
        return false;
    }
}
?>