--TEST--
In $a->$b[Y](), $b[Y] represents a method name on $a. But in $a->X[Y](), $a->X[Y] represents a global function name.
--FILE--
<?php
  class C
  {
      function foo($a, $b)
      {
          echo "Called C::foo($a, $b)\n";
      }
  }
  
  $c = new C;
  
  $functions[0] = 'foo';
  $functions[1][2][3][4] = 'foo';
  
  $c->$functions[0](1, 2);
  $c->$functions[1][2][3][4](3, 4);
  
  
  function foo($a, $b)
  {
      echo "Called global foo($a, $b)\n";
  }
  
  $c->functions[0] = 'foo';
  $c->functions[1][2][3][4] = 'foo';
  
  $c->functions[0](5, 6);
  $c->functions[1][2][3][4](7, 8);
?>
--EXPECTF--
Called C::foo(1, 2)
Called C::foo(3, 4)
Called global foo(5, 6)
Called global foo(7, 8)