Description:
------------
The reflection documentation states that there is a method getPosition() on instances of ReflectionParameter since 5.1.3, but it does not exist (at least here).

Reproduce code:
---------------
dotxp@tango ~ $ php -a
Interactive shell

php > function foo($param) {}
php > $fkt = new ReflectionFunction("foo");
php > $pars = $fkt->getParameters();
php > $par = $pars[0];
php > var_dump($par->getPosition());

-------------------------------------------------------

dotxp@tango ~ $ php -a
Interactive shell

php > var_dump(get_class_methods("ReflectionParameter"));


Actual result:
--------------
Fatal error: Call to undefined method ReflectionParameter::getPosition() in php shell code on line 1

Call Stack:
   60.5766      68372   1. {main}() php shell code:0


-------------------------------------------------------

array(12) {
  [0]=>
  string(6) "export"
  [1]=>
  string(11) "__construct"
  [2]=>
  string(10) "__toString"
  [3]=>
  string(7) "getName"
  [4]=>
  string(19) "isPassedByReference"
  [5]=>
  string(17) "getDeclaringClass"
  [6]=>
  string(8) "getClass"
  [7]=>
  string(7) "isArray"
  [8]=>
  string(10) "allowsNull"
  [9]=>
  string(10) "isOptional"
  [10]=>
  string(23) "isDefaultValueAvailable"
  [11]=>
  string(15) "getDefaultValue"
}