What does this syntax mean in PHP?? Do you know ?

[aabid]

I just came up with a line of code that I am not able to understand what's it doing.

The code is:

function cost()
{
return $this->costStrategy->cost($this);
}

 

here costStrategy is a class property which holds a reference to the object of type CostStrategy class and cost() is a method defined in CostStrategy.

[runthis]

So your saying it looks like

 

class costStrategy{
function cost()
{
return $this->costStrategy->cost($this);
}
}

 

?

 

instead of returning the value, try printing it and see what it says or what it affects

 

[salathe]

From your description it sounds like you've got all of the pieces clear in your head. What in particular are you having trouble understanding?

[aabid]

return $this->costStrategy->cost($this);

 

what does "cost($this)" means in above line ??

[aabid]

not able to get it yet also, searched but not found anything which clear my doubts

[salathe]

cost($this) is calling the cost method of the $this->costStrategy object (an instance of the CostStrategy class), and passing along the current object ($this, see docs)) as the first and only argument to that method.

[KevinM1]

In other words, objects can pass themselves as method parameters.  Pretty wild, huh?