php事件機制

遊戲中經常用到事件，這裏模仿一個。直接 上代碼

<?php
namespace event;

//是否開啓匹配模式
// if(function_exists('FNMATCH')){
//     define('FNMATCH',true);
// }else{
//     define('FNMATCH',false);
// }

class EventEmmitter{

    
    // public static $instance = null;
    // /**
    //  *
    //  * @return EventManager
    //  */
    // public static function getInstance()
    // {
    //     if (!self::$instance) {
    //         self::$instance = new self();
    //     }

    //     return self::$instance;
    // }

    /**
     * @var array
     */
    protected $listeners = array();
    /**
     * fire event
     * @param string $event
     * @param mixed $args
     * @return int 觸發次數
     */
    public function emit($event,$dataArr){
        $tempListeners = array();
        //刪除一次性的
        $emittedCount = 0;
        // print_r($this->listeners[$event]);
        foreach($this->listeners[$event] as $name => $listener){
            //一次性
            if(1 == $listener['isOnce']){

            }else{
                $tempListeners[] = $listener;
            }
            // print_r($listener);
            //調用函數
            call_user_func($listener['callback'],$dataArr);
            ++$emittedCount;
        }
        $this->listeners[$event] = $tempListeners;
        return $emittedCount;
    }

    /**
     * attach a event listener
     * @param string $event
     * @param callback 
     */
    public function on($event, $callback){
        if(!isset($this->listeners[$event])){
            $this->listeners[$event] = array();
        }
        $listener = array(
            'isOnce'=>0,//不是一次性
            'callback'=>$callback,
        );
        // print_r($listener);
        array_push($this->listeners[$event], $listener);
    }

    /**
     * attach a event listener once
     * @param string $event
     * @param callback 
     */
    public function once($event, $callback){
        if(!isset($this->listeners[$event])){
            $this->listeners[$event] = array();
        }
        $listener = array(
            'isOnce'=>1,//一次性
            'callback'=>$callback,
        );
        // print_r($listener);
        array_push($this->listeners[$event], $listener);
    }

    /**
     * turn off event
     */
    public function off($event){
        if(isset($this->listeners[$event])){
            unset($this->listeners[$event]);
        }
    }

    /**
     * remove all event
     */
    public function removeAll(){
        $this->listeners = array();
    }

    /**
     * get listener
     */
    public function getListener(){
        return $this->listeners;
    }
}

測試代碼

<?php
require_once "eventEmitter.php";

use event\EventEmmitter;

class Room{
    public function userInhome($data){
        print_r("class Room event userInhome data:".$data.PHP_EOL);
    }
    public function __invoke($data){
        print_r("class Room event __invoke data:".$data.PHP_EOL);
    }
    public static function roomInfo($data){
        print_r("class Room event roomInfo data:".$data.PHP_EOL);
    }
    public function userOutHome($data){
        print_r("class Room event userOutHome data:".$data.PHP_EOL);
    }
}

function messageEvent1($data){
    print_r("messageEvent1 data:".$data.PHP_EOL);
}

function messageEvent2($data){
    print_r("messageEvent2 data:".$data.PHP_EOL);
}

$eventManger = new EventEmmitter();
$room = new Room();
// $room->userInhome("before");
// $eventManger->on("test",call_user_func(array($room,"userInhome")));
$eventManger->on("test",array($room,"userInhome"));
$eventManger->on("test",array($room,"userOutHome"));
$eventManger->on("test","Room::roomInfo");

$eventManger->on("test",'messageEvent1');
$eventManger->once("test",'messageEvent2');

$clourse1 = function($data){
    print_r("clourse1 data:".$data.PHP_EOL);
};

$clourse2 = function($data){
    print_r("clourse2 data:".$data.PHP_EOL);
};

$eventManger->on("test",$clourse1);
$eventManger->once("test",$clourse2);

$eventManger->emit("test"," first");
$eventManger->emit("test"," second");