Using PHP Standard library SPL in implementing Observer mode

The last time you used pure PHP to implement an observer pattern (PHP watcher mode), now using PHP standard library SPL to implement the Observer mode at a time, the advantage is: randomly generate the observer you want to use!

 Storage = new Splobjectstorage ();    } function Attach (Splobserver $observer) {$this->storage->attach ($observer);    } function Detach (Splobserver $observer) {$this->storage->detach ($observer);        } function Notify () {foreach ($this->storage 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;    }}/** * Only for the logged-in Viewer * class Loginobserver */abstract class Loginobserver implements Splobserver {private $login;        function __construct (Login $login) {$this->login = $login;    $login->attach ($this); }/** * External access point * @param splsubject $subject */function Update (Splsubject $subject) {if ($subj        ECT = = = $this->login) {$this->doupdate ($subject); }} Abstract function DoUpdate (Login $login);} /** * Class emailobserver */class Emailobserver extends loginobserver{//different functions of the viewer implement different function functions DoUpdate (Login $l        Ogin) {$status = $login->getstatus (); if ($status = = Login::login_access) {//$this->sendmail (' User ip: '. $observable->ip. ' Login successful! '); echo __class__. ' User ip: '. $login->ip. ' Login successful! '        ------------------'; if ($status = = Login::login_wrong_pass) {//$this->sendmail (' User ip: '. $observable->ip. ' Login failed, password wrong! ')            ; echo __class__. ' User ip: '. $login->ip. ' Login failed, password wrong! '. '        ------------------'; if ($status = = Login::login_user_unknown) {//$this->sendmail (' User ip: '. $observable->ip. ' Login failed, no this user! ')            ); echo __class__. ' User ip: '. $login->ip. ' Login failed, no this user! '. '        ------------------'; }}//Instantiate the login information $login = new login ();//implement e-mail observer New Emailobserver ($login);//Start landing $login->handlelogin ();

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