php設計模式之觀察者模式_PHP教程

php設計模式之觀察者模式

/** * Interface Observable * define a observable interface * @author jichao.wang */interface Observable{    function attach(Observer $observer);    function detach(Observer $observer);    function notify();}/** * Class Login * @author jichao.wang */class Login implements Observable{    private $observers;    public $status;    public $ip;    const LOGIN_ACCESS = 1;    const LOGIN_WRONG_PASS = 2;    const LOGIN_USER_UNKNOWN = 3;    function __construct()    {        $this->observers = array();    }    /**     * @param Observer $observer     * @author jichao.wang     * attach a observer     */    function attach(Observer $observer)    {        $this->observers[] = $observer;    }    /**     * @param Observer $observer     * @author jichao.wang     * detach a observer     */    function detach(Observer $observer)    {        $newObservers = array();        foreach ($this->observers as $key => $obs) {            if ($obs !== $observer) {                $newObservers[] = $obs;            }        }        $this->observers = $newObservers;    }    /**     * @author jichao.wang     * handle observer notify     */    function notify()    {        foreach ($this->observers as $obs) {            $obs->update($this);        }    }    /**     * @author jichao.wang     * 執行登陸     */    function handleLogin()    {        $ip = rand(1,100);        switch (rand(1, 3)) {            case 1:                $this->setStatus(self::LOGIN_ACCESS, $ip);                $ret = true;                break;            case 2:                $this->setStatus(self::LOGIN_WRONG_PASS, $ip);                $ret = false;                break;            case 3:                $this->setStatus(self::LOGIN_USER_UNKNOWN, $ip);                $ret = false;                break;        }        /**         * handle event         */        $this->notify();        return $ret;    }    /**     * @param $status     * @author jichao.wang     * set login status     */    function setStatus($status,$ip)    {        $this->status = $status;        $this->ip = $ip;    }    /**     * @return mixed     * @author jichao.wang     * get login status     */    function getStatus()    {        return $this->status;    }}/** * Interface Observer * @author jichao.wang */interface Observer {    function update(Observable $observable);}/** * Class EmailObserver * @author jichao.wang */class EmailObserver implements Observer {    function update (Observable $observable) {        $status = $observable->getStatus();        if($status == Login::LOGIN_ACCESS){//            $this->sendMail('使用者ip:'.$observable->ip.'登陸成功!');            echo __CLASS__.'使用者ip:'.$observable->ip.'登陸成功!'.'------------------';        }        if($status == Login::LOGIN_WRONG_PASS){//            $this->sendMail('使用者ip:'.$observable->ip.'登陸失敗，密碼錯誤!');            echo __CLASS__.'使用者ip:'.$observable->ip.'登陸失敗，密碼錯誤!'.'------------------';        }        if($status == Login::LOGIN_USER_UNKNOWN){//            $this->sendMail('使用者ip:'.$observable->ip.'登陸失敗，無此使用者!');            echo __CLASS__.'使用者ip:'.$observable->ip.'登陸失敗，無此使用者!'.'------------------';        }    }}/** * Class PhoneObserver * @author jichao.wang */class PhoneObserver implements Observer {    function update (Observable $observable) {        $status = $observable->getStatus();        if($status == Login::LOGIN_ACCESS){//            $this->sendMail('使用者ip:'.$observable->ip.'登陸成功!');            echo __CLASS__.'使用者ip:'.$observable->ip.'登陸成功!'.'------------------';        }        if($status == Login::LOGIN_WRONG_PASS){//            $this->sendMail('使用者ip:'.$observable->ip.'登陸失敗，密碼錯誤!');            echo __CLASS__.'使用者ip:'.$observable->ip.'登陸失敗，密碼錯誤!'.'------------------';        }        if($status == Login::LOGIN_USER_UNKNOWN){//            $this->sendMail('使用者ip:'.$observable->ip.'登陸失敗，無此使用者!');            echo __CLASS__.'使用者ip:'.$observable->ip.'登陸失敗，無此使用者!'.'------------------';        }    }}class AbcObserver implements Observer {    function update (Observable $observable) {        $status = $observable->getStatus();        if($status == Login::LOGIN_ACCESS){//            $this->sendMail('使用者ip:'.$observable->ip.'登陸成功!');            echo __CLASS__.'使用者ip:'.$observable->ip.'登陸成功!'.'------------------';        }        if($status == Login::LOGIN_WRONG_PASS){//            $this->sendMail('使用者ip:'.$observable->ip.'登陸失敗，密碼錯誤!');            echo __CLASS__.'使用者ip:'.$observable->ip.'登陸失敗，密碼錯誤!'.'------------------';        }        if($status == Login::LOGIN_USER_UNKNOWN){//            $this->sendMail('使用者ip:'.$observable->ip.'登陸失敗，無此使用者!');            echo __CLASS__.'使用者ip:'.$observable->ip.'登陸失敗，無此使用者!'.'------------------';        }    }}//執行個體化登陸資訊$login = new Login();//實現發郵件觀察者$login->attach(new EmailObserver());//實現發驗證碼觀察者$login->attach(new PhoneObserver());//實現其他觀察者$login->attach(new AbcObserver());//開始登陸$login->handleLogin();?>

http://www.bkjia.com/PHPjc/931647.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/931647.htmlTechArticlephp設計模式之觀察者模式 /** * Interface Observable * define a observable interface * @author jichao.wang */interface Observable{ function attach(Observer $observer); func...

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