note 50303 added to features.cookies

How to change value of cookie? I have cookie name 'abc' with value 'abc' This is code: $abc = @$HTTP_GET_VARS['abc']; if(!isset($abc)) { }else if($abc == "xyz"){ if (isset($_COOKIE["abc"])){ @setcookie('abc', '', time()-60*60*24*2); @setcookie('abc', 'xyz', time()+60*60*24*2); } } else if ($abc == "en" ) { @setcookie('abc', 'en', time()+60*60*24*2);} Why value of cookie name 'abc' cann't change when I type ?abc=xyz Please tell me how to click a link for change value of cookie? ---- Manual Page -- http://www.php.net/manual/en/features.cookies.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+50303 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+50303&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+50303&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+50303&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+50303&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+50303&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+50303&report=yes Search -- http://master.php.net/manage/user-notes.php