Remove a cookie

Question

When I want to remove a Cookie I try  unset   COOKIE  hello       I see in my cookie browser from firefox that the cookie still exists  How can I really remove the cookie

User · Answer

See the sample labelled  Example  2 setcookie   delete example  from the PHP docs  To clear a cookie from the browser  you need to tell the browser that the cookie has expired    the browser will then remove it  unset as you ve used it just removes the  hello  cookie from the COOKIE array

User · Answer

A clean way to delete a cookie is to clear both of   COOKIE value and browser cookie file    if  isset   COOKIE  key           unset   COOKIE  key         setcookie  key       time   - 3600           empty value and old timestamp

User · Answer

I had the same problem in my code and found that it was a cookie path issue   Check out this stack overflow post  Can  39 t delete php set cookie   I had set the cookie using a path value of      but didn t have any path value when I tried to clear it  so it didn t clear   So here is an example of what worked   Setting the cookie    cookiePath         cookieExpire   time    60 60 24    one day - gt  seconds minutes hours setcookie  CookieName   cookieValue  cookieExpire  cookiePath     Clearing the cookie   setcookie  cookieName      time  -3600   cookiePath   unset    COOKIE  cookieName       Hope that helps

User · Answer

Set the value to    and the expiry date to yesterday  or any date in the past   setcookie  hello       time  -3600     Then the cookie will expire the next time the page loads

User · Answer

If you set the cookie to expire in the past  the browser will remove it   See setcookie   delete example at php net

User · Answer

If you want to delete the cookie completely from all your current domain then the following code will definitely help you   unset   COOKIE  hello     setcookie  hello       time   - 300         This code will delete the cookie variable completely from all your domain i e        - it denotes that cookie variable s value all set for all domain not just for current domain or path  time   - 300 denotes that it sets to a previous time so it will expire   Thats how it s perfectly deleted

User · Answer

I know that there has been a long time since this topic has been created but I saw a little mistake within this solution  I can call it like that  because it s a detail   I agree that the better solution is probably this solution   if  isset   COOKIE  remember user                   unset   COOKIE  Hello                 unset   COOKIE  HelloTest1                 setcookie  Hello   null  -1                    setcookie  HelloTest1   null  -1                    return true            else               return false              But  in the present case  you delete the cookies in every case where the unset function works and immediately you create new expired cookies in case that the unset function doesn t work   That means that even if the unset function works  it will still have 2 cookies on the computer  The asked goal  in a logical point of view  is to delete the cookies if it is possible and if it really isn t  make it expire  to get  the cleanest  result   So  I think we better should do   if  isset   COOKIE  remember user                   setcookie  Hello   null  -1                    setcookie  HelloTest1   null  -1                    unset   COOKIE  Hello                 unset   COOKIE  HelloTest1                 return true            else               return false              Thanks and have a nice day

User · Answer

You can simply use this customize function   function unset cookie  cookie name        if  isset   COOKIE  cookie name              unset   COOKIE  cookie name            setcookie  cookie name  null  -1         else   return false        If you want to remove   COOKIE  user account    Just use   unset cookie  user account

User · Answer

It s simple   setcookie  cookiename    cookievalue   1

User · Answer

To delete cookie you just need to set the value to NULL    If you ve set a cookie with nondefault values for an expiration time  path  or domain  you must provide those same values again when you delete the cookie for the cookie to be deleted properly    Quote from  Learning PHP5  book   So this code should work works for me    Setting the cookie  setcookie  foo    bar   time     60   5    Deleting the cookie  setcookie  foo       time     60   5    But i noticed that everybody is setting the expiry date to past  is that necessary  and why

User · Answer

Just set the expiration date to one hour ago  if you want to  remove  the cookie  like this   setcookie   TestCookie       time   - 3600     or  setcookie   TestCookie       time   - 3600     rasmus     example com   1     Source  http   www php net manual en function setcookie php  You should use the filter input   function for all globals which a visitor can enter manipulate  like this    visitors ip   filter input INPUT COOKIE   id      You can read more about it here  http   www php net manual en function filter-input php and here  http   www w3schools com php func filter input asp

User · Answer

Most of you are forgetting that this will only work on a local machine  On a domain you will need a pattern like this example   setcookie  example cookie    password   time  -3600         SERVER  SERVER NAME

User · Answer

You could set a session variable based on cookie values  session start     if isset   COOKIE  loggedin     amp  amp     COOKIE  loggedin       true        SESSION  loggedin      true      echo    SESSION  loggedin       true     You are logged in     Please Login to continue

User · Answer

That will unset the cookie in your code  but since the   COOKIE variable is refreshed on each request  it ll just come back on the next page request   To actually get rid of the cookie  set the expiration date in the past      set the expiration date to one hour ago setcookie  hello       time  -3600

User · Answer

When you enter 0 for time  you mean  now    0s from now is actually now  for the browser and it deletes the cookie   setcookie  key   NULL  0          I checked it in chrome browser that gives me   Name  key Content  Deleted Created  Sunday  November 18  2018 at 2 33 14 PM Expires  Sunday  November 18  2018 at 2 33 14 PM

User · Answer

cookie name    my cookie    cookie value    my value    cookie new value    my new value       Create a cookie  setcookie  cookie name   cookie value   time      86400   30           86400   24 hours in seconds     Get value in a cookie   cookie value     COOKIE  cookie name       Update a cookie  setcookie  cookie name   cookie new value   time      86400   30             Delete a cookie  setcookie  cookie name       time   - 3600            time   - 3600 means  set the cookie expiration date to the past hour

User · Answer

This is how PHP v7 setcookie   code works when you do    lt  php     setcookie  user id           setcookie  session         gt    From the output of tcpdump while sniffing on the port 80  the server sends to the client  Browser  the following HTTP headers   Set-Cookie  user id deleted  expires Thu  01-Jan-1970 00 00 01 GMT  Max-Age 0 Set-Cookie  session deleted  expires Thu  01-Jan-1970 00 00 01 GMT  Max-Age 0   Observing packets in the following requests the Browser no longer sends these cookies in the headers

User · Answer

You have to delete cookies with php in your server and also with js for your browser    They has made with php  but cookie files are in the browser client too    An example   if    GET  action       exit                   delete cookies with js and then in server with php              echo                lt script type  text javascript  gt                  var delete cookie   function name                         document cookie   name      expires Thu  01 Jan 1970 00 00 01 GMT                                       delete cookie  madw                    delete cookie  usdw                 lt  script gt                 unset   COOKIE  cookie name     unset   COOKIE  cookie time

User · Answer

Just set the value of cookie to false in order to unset it   setcookie  cookiename   false     PS - That s the easiest way to do it

User · Answer

You May Try this  if  isset   COOKIE  remember user           unset   COOKIE  remember user          setcookie  remember user   null  -1             return true    else       return false

User · Answer

To reliably delete a cookie it s not enough to set it to expire anytime in the past  as computed by your PHP server  This is because client computers can and often do have times which differ from that of your server   The best practice is to overwrite the current cookie with a blank cookie which expires one second in the future after the epoch  1 January 1970 00 00 00 UTC   as so   setcookie  hello       1

User · Answer

To remove all cookies you could write   foreach    COOKIE as  key   gt   value        unset  value       setcookie  key      time   - 3600

[php] Remove a cookie

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