title: PHP __call vs method_exists
body: <p>The Project I'm working on contains something like a wrapper for call_user_func(_array) which does some checks before execution.
  One of those checks is method_exists (In Case the supplied first argument is an instance of a class and the second is a method name)
  The other is_callable.
  The function will throw an exception if one of those checks fails.</p>
  
  <p>My Code contains an array with function names (setFoo, setBar, etc.) and the php magic function for overloading (__call) which handles setting, replacing and deletion of certain variables (better certain array elements).</p>
  
  <p>The Problem:
  method_exists will return false if the function is not defined.</p>
  
  <p>Do I have any chance to get a true if the __call function does proper handling of the request?</p>