Briefing Zend Knowledge

An object can be counted with count() and sizeof() if it..

seenagape

An object can be counted with count() and sizeof() if it..

A.
implements ArrayAccess

B.
has a public__count() method

C.
was cast to an object from an array

D.
None of the above

Explanation:
– It must implement the count() method (no underscores)