1. Create the following PHP program

   xdebug_start_trace();
   abstract class A
   {
   abstract function foo();

   public function bar()
   {
       echo "A Test","\n";
   }

   }

   class B extends A
   {
   public function foo()
   {
   }
   }

   $test = new B;
   $test->bar();

2. Execute program by visiting it in a web browser

3. View Trace File

Expected Output:

TRACE START [2012-03-18 22:32:29]
    0.0023     642888     -> B->bar() /path/to/xdebug.php:21
    0.0027       8512
TRACE END   [2012-03-18 22:32:29]

Actual Output

TRACE START [2012-03-18 22:32:29]
    0.0023     642888     -> A->bar() /path/to/xdebug.php:21
    0.0027       8512
TRACE END   [2012-03-18 22:32:29]

The output discrepancy is B->bar() vs. A->bar(). The object was instantiated with a class "B", but xDebug reports the base class, A->Bar();