php - How to delete cookies using javascript after certain time - Stack Overflow

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I am trying to delete a the value cookie that I created after a certain interval. Lets say after 10 second I want the cookie gone

function fullday()
{
    document.getElementById("res").innerHTML="1 day";
    document.cookie="day="+1;
    document.cookie.setMaxAge(0);
}

This is the code above. I'm coding in PHP right now and then when I try to destroy cookie from PHP it works fine, however I need to pass the cookie's value in javascript so now im stuck with it and cannot destroy it.

I am trying to delete a the value cookie that I created after a certain interval. Lets say after 10 second I want the cookie gone

function fullday()
{
    document.getElementById("res").innerHTML="1 day";
    document.cookie="day="+1;
    document.cookie.setMaxAge(0);
}

This is the code above. I'm coding in PHP right now and then when I try to destroy cookie from PHP it works fine, however I need to pass the cookie's value in javascript so now im stuck with it and cannot destroy it.

• php
• javascript
• ajax

Share Improve this question Follow edited Oct 11, 2012 at 11:28 slugster 50k1414 gold badges103103 silver badges148148 bronze badges asked Oct 11, 2012 at 11:24 freakyfreaky 29444 silver badges1414 bronze badges 2

• Why not just set the expire date to 10 mins from the moment you create it? – TJHeuvel Commented Oct 11, 2012 at 11:31
• Its working fine when its in php but doesnt work when i passed the cookie to java – freaky Commented Oct 11, 2012 at 11:32

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4 Answers 4

Sorted by: Reset to default 5

In order to delete a cookie you need to set the expiry date to something in the past. A function that does this would be for example:

var delete_cookie = function(name) {
    document.cookie = name + '=;expires=Thu, 01 Jan 1970 00:00:01 GMT;';
};

Then to delete a cookie named "cookie" just do.

delete_cookie('cookie');

pass cookie name at "key"

 _generatePrefix: function()
    {
        return '__session:' + this._id + ':';
    }
  _cookieCache: undefined,
function cookie clear(key)
  {    
    document.cookie = this._generatePrefix() + key + '=; path=/; expires=Thu, 01 Jan 1970 00:00:01 GMT;';
    delete this._cookieCache[key]
  }

call this function when u need clear specific cookie

if u want clear all cookie use this

   _generatePrefix: function()
    {
        return '__session:' + this._id + ':';
    }
     _cookieCache: undefined, 
     function clearall()
    {
        for (var i in this._cookieCache) {
            document.cookie = this._generatePrefix() + i + '=; path=/; expires=Thu, 01 Jan 1970 00:00:01 GMT;';
        }
        this._cookieCache = {};
    }

use it like this

var date1 = new Date();
date1.setTime(date.getTime()+(10*1000));
var expires = "; expires="+date.toGMTString();

document.cookie = "day="+1+expires;

this will expire the cookie after 10 seconds.

The first question to ask is why you didn't just the cookie expiry time when you created the cookie?

The second question to ask is how did you create the cooklie? Via Javacript or PHP?

You can't retrieve anything other than the cookie value in javascript - hence if you want to know how old a cookie is, then you'd need to embed that information in the value - however if the cookie is set from PHP, and with a TTL of 10 seconds, you're going to run in clock sync issues - you'd need to generate javascript to create the timestamped cookie from serverside rather than callnig setcookie directly.

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