如何初始化静态变量

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private static $dates = array(
  'start' => mktime( 0,  0,  0,  7, 30, 2009),  // Start date
  'end'   => mktime( 0,  0,  0,  8,  2, 2009),  // End date
  'close' => mktime(23, 59, 59,  7, 20, 2009),  // Date when registration closes
  'early' => mktime( 0,  0,  0,  3, 19, 2009),  // Date when early bird discount ends
);

Parse error: syntax error, unexpected '(', expecting ')' in 
/home/user/Sites/site/registration/inc/registration.class.inc on line 19

回答

class Foo {
  static $bar;
}
Foo::$bar = array(…);

class Foo {
  private static $bar;
  static function init()
  {
    self::$bar = array(…);
  }
}
Foo::init();