The Observer pattern for PHP design Patterns

<span style= "font-family:arial, Helvetica, Sans-serif;" ><?php</span>

/** * Interface Observable * Define a Observable Interface * @author jichao.wang */interface observable{function Attac    H (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 (obser    Ver $observer) {$this->observers[] = $observer; }/** * @param Observer $observer * @author Jichao.wang * Detach a Observer * function detach (obser        Ver $observer) {$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-&gt        ; observers as $obs) {$obs->update ($this);        }}/** * @author Jichao.wang * Execute login */function Handlelogin () {$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 () {R    Eturn $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 (' User ip: '. $observable->ip. ' Login successful! '); echo __class__. ' User ip: '. $observable->ip. ' Login successful! '        ------------------'; if ($status = = Login::login_wrong_pass) {//$this->sendmail (' User ip: '. $observable->ip. ' Login failed, password wrong! ')            ; echo __class__. ' User ip: '. $observable->ip. ' Login failed, password wrong! '. '        ------------------'; } if ($status = = Login::login_User_unknown) {//$this->sendmail (' User ip: '. $observable->ip. ' Login failed, no this user! '); echo __class__. ' User ip: '. $observable->ip. ' Login failed, no this user! '. '        ------------------'; }}}/** * Class phoneobserver * @author Jichao.wang */class Phoneobserver implements Observer {function update (Obs        Ervable $observable) {$status = $observable->getstatus ();            if ($status = = login::login_access) {//$this->sendmail (' User ip: '. $observable->ip. ' Login successful! '); echo __class__. ' User ip: '. $observable->ip. ' Login successful! '        ------------------'; if ($status = = Login::login_wrong_pass) {//$this->sendmail (' User ip: '. $observable->ip. ' Login failed, password wrong! ')            ; echo __class__. ' User ip: '. $observable->ip. ' Login failed, password wrong! '. '        ------------------'; if ($status = = Login::login_user_unknown) {//$this->sendmail (' User ip: '. $observable->ip. ' Login failed, no this user! ')            ); echo __class__. ' User ip: '. $observable->ip. ' Login failed, no this user! '. ' ------------------'; }}}class Abcobserver implements Observer {function update (Observable $observable) {$status = $observable-        >getstatus ();            if ($status = = login::login_access) {//$this->sendmail (' User ip: '. $observable->ip. ' Login successful! '); echo __class__. ' User ip: '. $observable->ip. ' Login successful! '        ------------------'; if ($status = = Login::login_wrong_pass) {//$this->sendmail (' User ip: '. $observable->ip. ' Login failed, password wrong! ')            ; echo __class__. ' User ip: '. $observable->ip. ' Login failed, password wrong! '. '        ------------------'; if ($status = = Login::login_user_unknown) {//$this->sendmail (' User ip: '. $observable->ip. ' Login failed, no this user! ')            ); echo __class__. ' User ip: '. $observable->ip. ' Login failed, no this user! '. '        ------------------'; The}}//instantiates the login information $login = new Login (),//implements the E-mail observer $login->attach (new Emailobserver ());//implements the verification Code observer $login->attach (new Phoneobserver ());//implement other observer $login->attach (new Abcobserver ());//Start Landing $login->handlelOgin ();? >

The Observer pattern for PHP design Patterns