Pro PHP- Patterns, Frameworks, Testing and More

CHAPTER 14 ■ MVC ARCHITECTURE^209

static $_instance;

public static function getInstance() {

if(! (self::$_instance instanceof self) ) {

self::$_instance = new self();

}

return self::$_instance;

}

private function __construct() {

$request = $_SERVER['REQUEST_URI'];

$splits = explode('/', trim($request,'/'));

$this->_controller = !empty($splits[0])?$splits[0]:'index';

$this->_action = !empty($splits[1])?$splits[1]:'index';

if(!empty($splits[2])) {

$keys = $values = array();

for($idx=2, $cnt = count($splits); $idx<$cnt; $idx++) {

if($idx % 2 == 0) {

//Is even, is key

$keys[] = $splits[$idx];

} else {

//Is odd, is value;

$values[] = $splits[$idx];

}

}

$this->_params = array_combine($keys, $values);

}

}

public function route() {

if(class_exists($this->getController())) {

$rc = new ReflectionClass($this->getController());

if($rc->implementsInterface('IController')) {

if($rc->hasMethod($this->getAction())) {

$controller = $rc->newInstance();

$method = $rc->getMethod($this->getAction());

$method->invoke($controller);

} else {

throw new Exception("Action");

}

} else {

throw new Exception("Interface");

}

} else {

throw new Exception("Controller");

}

}

McArthur_819-9C14.fm Page 209 Thursday, February 28, 2008 7:44 AM