从更复杂的PHP函数中检索值

Question

If I have code like this

 $myFunction = new classFoo();                             //ie. class
 $myFunction-> new functionBar($value1,$value2,$value3);   //ie. function

I understand in a normal scenario, if I had this function...

function functionBar($value1,$value2,$value3){
    $answer=$value1+$value2+$value3
    return $answer
}

I could then plug into it like this

$answer=functionBar(1,2,3)

I could expect an echo of $answer to be 6, correct?

If I'm wrong there let me know, because my real issue is that the function is wrapped in a variable, which if I examine through console has what I need in it, but I can't get my head around how to access it with that extra layer involved.

Answer 1

because my real issue is that the function is wrapped in a variable [snip] but I can't get my head around how to access it with that extra layer involved.

Using your code and var names, and I've added the function which you do understand inside the class (is simply a function (aka "method") which essentially does the same thing - there are differences but not within the scope of your question).

It returns a value, which you can "wrap" (store) in a variable just the same as the function does without the class:

$myFunction = new foo();
$answer = $myFunction->functionBar(10, 20, 30);

class foo
{
    public function functionBar($value1, $value2, $value3)
    {
        return $value1 + $value2 + $value3;
    }
}

Your $answer var would contain "60". echoing it out would echo "60".