note 98009 added to function.key

Problem with classes, when extrasing key:

<?
 class klasa {
  function __construct($id_polaczenia_get=Null) {
   $this->config['local'] = Array ('key1' => 'value1',
    'key2'  => 'value2',
    'key3'  => 'value3');
  }
  function demo ($par=Null) {
   if ($par==Null) {
    $par = key ($this->config);  // should get 'local' key
  }

In this situation $par = Null instead of 'local'. After simple change:

  function demo ($par=Null) {
   if ($par==Null) {
    $___something = $this->config;
    $par = key ($this->config);
  }
it return properly key: 'local'.
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Server IP: 194.24.174.37
Probable Submitter: 83.11.33.234
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Manual Page -- http://www.php.net/manual/en/function.key.php
Edit        -- https://master.php.net/note/edit/98009
Del: integrated  -- https://master.php.net/note/delete/98009/integrated
Del: useless     -- https://master.php.net/note/delete/98009/useless
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Del: spam        -- https://master.php.net/note/delete/98009/spam
Del: non-english -- https://master.php.net/note/delete/98009/non-english
Del: in docs     -- https://master.php.net/note/delete/98009/in+docs
Del: other reasons-- https://master.php.net/note/delete/98009
Reject      -- https://master.php.net/note/reject/98009
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