Variable Scope

[TomTees]

In this code...

 

class Model {

public function getBook($title)

{

$allBooks = $this->getBookList();

return $allBooks[$title];

}

}

 

 

Questions:

---------------

1.) What is the scope of $allBooks?

 

Can it be seen outside the function and inside the class?

 

2.) Could I rewrite things like this...

 

class Model {

protected $allBooks;

 

public function getBook($title)

{

$allBooks = $this->getBookList();

$this->allBooks = $this->getBookList();

return $allBooks[$title];

}

}

 

 

3.) Sorta off-topic, but could I rewrite this code...

 

$allBooks = $this->getBookList();

return $allBooks[$title];

 

like this...

 

return $allBooks = $this->getBookList([$title]);

 

 

 

TomTees

 

 

[s0c0]

I'm not good with terminology but  in your first example the variable $allbooks can only be accessed within that function since it was only defined in that function.  To access it outside of the method it would need to be defined as a data attribute of the class Model. So yes, $this->allBooks would be accessible from the object.

[requinix]

As for the other two,

2) Yes, but the return statement won't work.

3) Yes, but there's no point to using the $allBooks variable in that case.

[ignace]

return $allBooks = $this->getBookList([$title]);

 

You probably are referring to:

 

return $this->getBookList()[$title];

 

And no you can't do that in PHP neither can you do: (new Object())->method(); Few things I liked about Java.