Netbeans PHP Go To Declaration fails for single word functions

Question

Netbeans "Go To Declaration" (Ctrl+B) works fine for functions like "actionEntity" but not for functions like "action". As an example, if I am calling a function as below.

$this->members->addMember($id);

The "Go To Declaration" (Ctrl+B) works fine and goes to the function addMember of class Members in Members.php.

However if I name the addMember function simply as add in the class Members and call that as below, Netbeans is not able to "Go to Declaration".

$this->members->add($id);

Can somebody explain why it doesn't work and provide me a fix / workaround? Thanks in anticipation.