constructor - PHP: Can I pass $this in the _constructor? -

constructor - PHP: Can I pass $this in the _constructor? -

i pass php object in own constructor object this:

class foo { $parent_object; public function __construct($obj) { $this->parent_object = $obj; } } class bar { public function __construct() { $blub = new foo($this); } }

the question asking myself is: can pass $this in constructor of bar, because object has not been created... $this valid reference whole object?

sure can. maintain in mind $this points current object though. in:

$blub = new foo($this);

$this points instance of bar. $obj in constructor of foo instance of bar.

$this available @ origin of constructor. if bar calls functions on $obj might instance of bar not yet in right state (ie. $blub has not been assigned). lead reference issues, solution move reference exchange out of constructor.

php constructor this