Develop Reference

javascript setCookie expiration wrong or ignored by browser?

Question about cookie expiration.
I'm trying the setCookie from w3schools.com
function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays*24*60*60*1000));
var expires = "expires="+ d.toUTCString();
document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
console.log(expires);
}
when I try (note: today 2020-03-17...)
setCookie("test_cookie", "hello world", 363);
chrome dev says cookie
expires 2020-03-24....
but console.log I added says
expires=Wed, 15 Mar 2021
same thing happens with toGMTString
seems the browser ignores expires, and does 7 days...
so how to really set a cookie expiring in 1 month or 1 year ???

delete cookie in JS - why not working without "path=/" in Chrome?

I created cookie by this code:
create_cookie = function(name, value, days){
var expires = "";
if (days) {
var date = new Date();
date.setTime(date.getTime() + (days*24*60*60*1000));
expires = "; expires=" + date.toGMTString();
}
document.cookie = name + "=" + value + expires + "; path=/";
};
create_cookie('ck','123',3); //cookie ck=123, expires after 3 days
When I execute console.log(document.cookie); I can see cookie created successfully.
Is anybody able to answer why this code fail to delete this cookie?
delete_cookie = function(name){
document.cookie = name+'=;expires=Thu, 01 Jan 1970 00:00:01 GMT;';
};
delete_cookie('ck');
(My browser is Google Chrome 79.0.3945.117 on Mac OSX 10.10)

You are forgetting to provide the path path=/
delete_cookie = function(name){
document.cookie = name+'=;expires=Thu, 01 Jan 1970 00:00:01 GMT; path=/;';
};
delete_cookie('ck');

Format GMT date to integer in PHP

I'm creating a cookie in JavaScript with this code. I actually changed the code a bit:
function setCookie (name,value,days) {
var expires, newValue;
if (days) {
var date = new Date(); // days = 0.0006944444; // testing with one minute
date.setTime(date.getTime()+(days*24*60*60*1000));
expires = "; expires="+date.toString();
newValue = encodeURIComponent(value)+'|'+date+expires;
} else expires = "";
document.cookie = name+"="+(newValue)+"; path=/";
}
So the above function sends encodeURIComponent(value)+'|'+date+expires as value. In PHP I can do explode('|',$_COOKIE['my-key']) with the date formatted like this:
$string_time = "Fri Oct 06 2017 19:34:44 GMT 0300 (Eastern European Summer Time);
Now I need to convert this string to integer to be compared against the PHP's time() integer format.
Doing the following:
$currentTime = date('YmdHis', time());
$expire_time = date('YmdHis', strtotime($string_time));
It actually outputs this:
string(14) "19700101000000" // $currentTime
string(14) "20171006162139" // $cookie_time
Question why is $currentTime always the same 19700101000000 value?

Just use a unix timestamp instead, as you're not getting the time from the expries settings, but from the cookies value
function setCookie (name,value,days) {
var expires, newValue;
if (days) {
var date = new Date();
date.setTime(date.getTime()+(days*24*60*60*1000));
expires = "; expires="+date.toUTCString();
newValue = date.getTime() / 1000;
} else {
expires = "";
}
document.cookie = name+"="+(newValue)+"; path=/";
}
Now you can compare it directly to the PHP unix timestamp from time() and get the difference in seconds.
Note that you're not even using the expires variable, so this does nothing when it comes to how long the cookie is valid.

How to set multiple values with two differents expires dates

I'm trying to set cookie in javascript with two values.
Each of theses have a different expiration date.
For example :
var now = new Date();
now.setDate( now.getDate() + 2 );
document.cookie = "bar=foo;";
document.cookie = "expires=" + now.toUTCString() + ";"
now = new Date();
now.setDate( now.getDate() + 30 );
document.cookie = "foo=bar;";
document.cookie = "expires=" + now.toUTCString() + ";"
Is it correct?
How to set another value with an expiration date for 30 days for example?

I think that approach is correct.
Based on: How can I set a cookie to expire after x days with this code I have? :
function createCookie(name,value,days) {
if (days) {
var date = new Date();
date.setTime(date.getTime()+(days*24*60*60*1000));
var expires = "; expires="+date.toGMTString();
}
else var expires = "";
document.cookie = name+"="+value+expires+"; path=/";
}
Note, that setTime() and getTime() work on milliseconds.
And a few words from me: as javascript's Date sucks, I recommend using moment.js library when working with dates, it's brilliant.

Ok, i found my reply here with the function "setCookie". I've specify differents values and it's working.
http://www.w3schools.com/js/js_cookies.asp

Delete or reset a browser cookie via Javascript

HTML links:
Logout
Logout
Logout
Logout
Logout
Logout
Javascript:
function delete_cookie(rememberKeepMeLoggedIn) {
var cookie_date = new Date ( );
cookie_date.setTime ( cookie_date.getTime() - 1 );
document.cookie = rememberKeepMeLoggedIn += "=; expires=" + cookie_date.toGMTString();
}
function del_cookie(name) {
document.cookie = 'acceptsCookies=; expires=Thu, 01 Jan 1970 00:00:00 GMT;'; window.location = "http://www.smugmug.com/logout.mg?goTo=#"
}
function eraseCookie(name) {
var cookies = document.cookie.split(";");
for (var i = 0; i < cookies.length; i++)
eraseCookies(cookies[i].split("=")[0]);
}
How can I delete or reset a cookie with the name "UP-759283"?
Does the syntax below look good?
Here's my javascript function:
function del_cookie() {
document.cookie = UP-759283 +'=; expires=Thu, 01-Jan-70 00:00:01 GMT;';
}
The HTML URL callout
Logout

Does the syntax below look good?
No; just run your code through JSLint and you'll see. Change
document.cookie = UP-759283 +'=; expires=Thu, 01-Jan-70 00:00:01 GMT;';
to
document.cookie = 'UP-759283=; expires=Thu, 01-Jan-70 00:00:01 GMT;';
As per the MDC document.cookie docs, cookies are deleted by setting the expiration time to zero:
document.cookie = 'UP-759283=; expires=Thu, 01 Jan 1970 00:00:00 GMT;';
Other reference: cookies # quirksmode
.