HowTo: Get Cookies Across Subdomains PHP

By VoiDeT on April 8, 2008, 5,342 views

HowTo: Get Cookies Across Subdomains PHP

So you are using cookies on your website, but when a visitor visits www.yourdomain.com and yourdomain.com the cookie doesn’t get set across both! That is because in essence, www. is simply a subdomain. The “www” component is not a protocol, it is not necessary, instead all it is, is just a marketing ploy. But anyway. Here is what you would do normally:

setcookie('YourCookieName', 'Some Values', time() + 3600, '/', 'mydomain.com');

Damn! Almost there! The part you are missing to add a cookie irrespective of the subdomain is “.mydomain.com”. Yep, just add a . infront of your domain name. So you would have:

setcookie('YourCookieName', 'Some Values', time() + 3600, '/', '.mydomain.com');

All done ^^ Enjoy

Posted by VoiDeT –

Categorised under PHP

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6 Comments

Aaron

Thanks!

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June 25, 2008 @ 7:27 am
Kenneth

Nice tutorial

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October 31, 2008 @ 8:59 pm
Biily Bob

Great tut, straight to the point. Good work.

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April 23, 2009 @ 7:17 am
SpYeR

Thanks. Very useful for sites with blogs.mydomain.com, news.mydomain.com etc.

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October 29, 2009 @ 4:12 am
khal3d

what about session?

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December 12, 2009 @ 10:03 am
VoiDeT

ini_set(‘session.cookie_domain’, ‘.whatever.com’); should do the trick

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December 12, 2009 @ 10:09 am

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