Why is the first parameter in call_user_func_array an array?

In WordPress, call_user_func_array is used like this:

[CODE]call_user_func_array( array( &$current_user, ‘has_cap’ ), $args );[/CODE]

According to PHP.net, the first parameter should be a function. Also, the function “has_cap” is in a class.

Also in #PHP _↴