Chain-of-responsibility pattern

chain.php

<pre>
<?php

abstract class Controller {

        protected $_data = array();
        protected $_chain = null;
        
        public function __construct(array $data = array()) {
                $this->_data = $data;
        }
        
        public function setChain(Handler $chain) {
                $this->_chain = $chain;
        }
        
        public function getChain() {
                return $this->_chain;
        }

        abstract public function runStrategy();

}

class C extends Controller {
        
        public function runStrategy() {
                $cs = array();
                for ($i = 0; $i < 2; $i++) {
                        $c1 = new CA(array('word1'.$i, 'word2'.$i, 'word3'.$i, 'word4'.$i));
                        $c2 = new CB(array('Russia'.$i, 'USA'.$i, 'China'.$i, 'France'.$i));
                        $c3 = new CC(array('hi'.$i, 'bye'.$i, '9000'.$i, '!-^-!'.$i));
                        $cs['s'][] = $c1;
                        $cs['m'][] = $c2;
                        $cs['f'][] = $c3;
                }
                foreach ($cs as $k => $vs) {
                        foreach ($vs as $v) {
                                $cs['r'][] = $v;
                        }
                }
                $cs = $cs['r'];
                $start = $this->getChain()->getNext();;
                
                foreach ($cs as $c) {
                        $start = new Handler($start);
                        $start->setController($c);
                } 
                $this->getChain()->setNext($start);
                print_r($this->getChain());
        }
        
}

class D extends Controller {

        public function runStrategy() {
                echo 'I am just D!<br />';
                printf('My data is: %s', print_r($this->_data, true));
        }

}

class CA extends Controller {

        public function runStrategy() {
                echo '<table border="1">';
                foreach ($this->_data as $item) {
                        echo "<tr><td>{$item}</td></tr>";
                }
                echo '</table>';
        }

}

class CB extends Controller {

        public function runStrategy() {
                foreach ($this->_data as $item) {
                        echo "{$item}<br />";
                }
        }

}

class CC extends Controller {

        public function runStrategy() {
                foreach ($this->_data as $item) {
                        echo "----{$item}<br />";
                }
        }

}


class Handler
{
    protected $_next = null;
    protected $_controller;
    
    public function getLimit()
    {
        return $this->limit;
    }
    
 
    public function __construct(Handler $handler = null)
    {   
        $this->setNext($handler);
    }
    
    public function setNext(Handler $handler = null) {
        $this->_next = $handler;
    }
    
    public function getNext() {
        return $this->_next;
    }
    
    public function getController() {
        return $this->_controller;
    }
    
    public function setController(Controller $controller) {
        $this->_controller = $controller;
    }
 
    public function handleRequest($state = 0)
    {
        if ($state === 0)
        {echo 'START FK<BR />';}
        $this->_controller->runStrategy();
        $state++;
        if ($this->_next) {
                $this->_next->handleRequest($state);
        }
        if ($state === 1) {echo 'STOP FK<BR />';}
    }
}
 
$cMain = new C();
$cAdditional = new D();
$cAdditional2 = new D(array('Second D'));
$start = new Handler();
$start->setController($cAdditional2);
$start = new Handler($start);
$start->setController($cAdditional);
$start = new Handler($start);
$start->setController($cMain);
$start->getController()->setChain($start);

echo '<br />';

$start->handleRequest();

?>
</pre>