I've been asking a few questions on this topic recently, so I feel it appropriate to link up the associated question(s).
PHP closures and implicit global variable scope
I've got a set of classes that use closures as in the example below (keep in mind I quickly punched together this example for this thread) My question involves passing the $obj argument to the functions.
Does there exist any sort of magic variable (cough-$this-cough) that would permit me to access the object it's called from, instead of needing to declare a placeholder argument of $obj or whatever? Perhaps I've misread, but it appears the functionality I'm seeking has been removed, at least in the context of $this.
class Test{
private $_color;
protected $_children = array();
public function __construct(Closure $function){
$function($this);
}
public function create(Closure $function){
return new self($function);
}
public function color($color){
$this->_color = $color;
return $this;
}
public function add(Closure $function){
$this->_children[] = new Test($function);
return $this;
}
}
Test::create(function($obj){
$obj->color('Red')
->add(function(){
$obj->color('Green');
})
->color('Blue');
});
The only alternative I can see off-hand is storing an instance of each object at creation, and providing a function to return that instance as follows:
class Test{
private $_color;
private static $_instance;
protected $_children = array();
public function __construct(Closure $function){
self::$_instance = $this;
$function();
}
.
.
.
public static function this(){
return self::$_instance;
}
}
Test::create(function(){
Test::this()
->color('Red')
->add(function(){
Test::this()
->color('Green');
})
->color('Blue');
});
