php-cookie-php Cannot delete cookies

$cookie retention Time
$falg User Unique identifier
$name User Name
Set Cookie Information
function _setcookie ($name, $flag, $time)
{

switch($time){    case 0:        setcookie('username',$name);        setcookie('userflag',$flag);        _alert_location('登录成功', 'index.php');        break;    case 1:        setcookie('username',$name,time()+86400);        setcookie('userflag',$flag,time()+86400);        _alert_location('登录成功', 'index.php');        break;    case 2:        setcookie('username',$name,time()+604800);        setcookie('userflag',$flag,time()+604800);        _alert_location('登录成功', 'index.php');        break;}

}
?>

IE and Firefox can not delete what is the reason ah?

Setcookie ("username", "", Time ()-1);
Setcookie ("Userflag", "", Time ()-1);

That's not true.

I've solved the problem of path.
Setcookie ("username", "", Time ()-1, '/my_dome%201.0/');
This looks good ~ but it's strange that when the local debugging why add '/my_dome%201.0/' can not be '/'? How to modify the website after the official launch?

More depressed is under the Firefox and IE under the path is not the same ~
Setcookie ("username", "", Time ()-1, '/my_dome%201.0/'); How to delete under Firefox
Setcookie ("Userflag", "", Time ()-1, '/my_dome%201.0/');
Setcookie ("username", "", Time ()-1, '/my_dome%201.0 '); How to delete under IE
Setcookie ("Userflag", "", Time ()-1, '/my_dome%201.0 ');

There is no good way to solve this problem ~

Reply content:

$cookie retention Time
$falg User Unique identifier
$name User Name
Set Cookie Information
function _setcookie ($name, $flag, $time)
{

switch($time){    case 0:        setcookie('username',$name);        setcookie('userflag',$flag);        _alert_location('登录成功', 'index.php');        break;    case 1:        setcookie('username',$name,time()+86400);        setcookie('userflag',$flag,time()+86400);        _alert_location('登录成功', 'index.php');        break;    case 2:        setcookie('username',$name,time()+604800);        setcookie('userflag',$flag,time()+604800);        _alert_location('登录成功', 'index.php');        break;}

}
?>

IE and Firefox can not delete what is the reason ah?

Setcookie ("username", "", Time ()-1);
Setcookie ("Userflag", "", Time ()-1);

That's not true.

I've solved the problem of path.
Setcookie ("username", "", Time ()-1, '/my_dome%201.0/');
This looks good ~ but it's strange that when the local debugging why add '/my_dome%201.0/' can not be '/'? How to modify the website after the official launch?

More depressed is under the Firefox and IE under the path is not the same ~
Setcookie ("username", "", Time ()-1, '/my_dome%201.0/'); How to delete under Firefox
Setcookie ("Userflag", "", Time ()-1, '/my_dome%201.0/');
Setcookie ("username", "", Time ()-1, '/my_dome%201.0 '); How to delete under IE
Setcookie ("Userflag", "", Time ()-1, '/my_dome%201.0 ');

There is no good way to solve this problem ~

See if path and domain are written incorrectly.

