JavaScript
In JavaScript you simple test for the cookieEnabled property, which is supported in all major browsers. If you deal with an older browser, you can set a cookie and check if it exists. (borrowed from Modernizer):
if (navigator.cookieEnabled) return true;
// set and read cookie
document.cookie = "cookietest=1";
var ret = document.cookie.indexOf("cookietest=") != -1;
// delete cookie
document.cookie = "cookietest=1; expires=Thu, 01-Jan-1970 00:00:01 GMT";
return ret;
- Modernizer cookie check commit
- Checking if Cookies are Enabled
PHP
In PHP it is rather “complicated” since you have to refresh the page or redirect to another script. Here I will use two scripts:
somescript.php
<?php
session_start();
setcookie('foo', 'bar', time()+3600);
header("location: check.php");
check.php
<?php echo (isset($_COOKIE['foo']) && $_COOKIE['foo']=='bar') ? 'enabled' : 'disabled';
- Detecting if the cookies are enabled with PHP
PHP and Cookies, A Good Mix!