Description:
------------
Parse_str accepts the string, but do not send back anything. 

With one argument, no variable is created. If this is 
register_globals related, we should state it in the docs. 

With 2 arguments, the array is emptied, but not filled.

This bugs is on PHP 5.1.4, 5.1.3 but not 4.4.2.

Reproduce code:
---------------
<?php
$str = "first=value&arr[]=foo+bar&arr[]=baz";
parse_str($str);
echo $first;  // value
echo $arr[0]; // foo bar
echo $arr[1]; // baz

parse_str($str, $output);
echo $output['first'];  // value
echo $output['arr'][0]; // foo bar
echo $output['arr'][1]; // baz
var_dump($output);

$query = 'parametre=valeur'; 

$q = array("1");
parse_str($query, $q);
var_dump($parametre);
var_dump($parametre2);
var_dump($tableau);

var_dump($q);
?>

Expected result:
----------------
valuefoo barbazvaluefoo barbazarray(2) {
  ["first"]=>
  string(5) "value"
  ["arr"]=>
  array(2) {
    [0]=>
    string(7) "foo bar"
    [1]=>
    string(3) "baz"
  }
}
NULL
NULL
NULL
array(1) {
  ["parametre"]=>
  string(6) "valeur"
}

Actual result:
--------------
PHP Notice:  Undefined variable: first in /Users/imac/
Desktop/test.bug.php on line 15
PHP Notice:  Undefined variable: arr in /Users/imac/Desktop/
test.bug.php on line 16
PHP Notice:  Undefined variable: arr in /Users/imac/Desktop/
test.bug.php on line 17
PHP Notice:  Undefined index:  first in /Users/imac/Desktop/
test.bug.php on line 20
PHP Notice:  Undefined index:  arr in /Users/imac/Desktop/
test.bug.php on line 21
PHP Notice:  Undefined index:  arr in /Users/imac/Desktop/
test.bug.php on line 22
array(0) {
}
PHP Notice:  Undefined variable: parametre in /Users/imac/
Desktop/test.bug.php on line 29
NULL
PHP Notice:  Undefined variable: parametre2 in /Users/imac/
Desktop/test.bug.php on line 30
NULL
PHP Notice:  Undefined variable: tableau in /Users/imac/
Desktop/test.bug.php on line 31
NULL
array(0) {
}