Description:
------------
With use of static array with boolean indexes inside the class methods occurs implicitly converting boolean to integer. 

Reproduce code:
---------------
<?php
class ClassA
{
  public static $arr =
    array(FALSE => "This is FALSE",
          TRUE  => "This is TRUE");
  
  static public function test()
  {
    $arr = array(FALSE => "This is FALSE",
                 TRUE  => "This is TRUE");
    
    echo self::$arr[TRUE];
    echo "<br>".$arr[TRUE];
  }          
}

ClassA::test();
?>

Expected result:
----------------
This is TRUE 
This is TRUE

Actual result:
--------------
Notice: Undefined offset: 1 in ... on line 13 
This is TRUE