PHP and Javascript cookies

Question

Can I access a cookie written with jQuery's cookie plug-in with PHP? I know you can't set Javascript equal to PHP or vice versa, but IN ESSENCE is:

$.cookie('var') = $_COOKIE['var']?

Again, I know you can't set them equal to each other, but if I set it in jQuery and then go to another page, can PHP access it? I've read lots of posts about this, but I can't seem to find an answer to this part.

Note, if I look in Firefox's preferences, I can see the cookies are there, so I know they're set.

Yes, they're the same. PHP can handle cookies set by JS and vice versa. — Ben
– Ben, Commented Jan 14, 2011 at 20:52

josh3736 · Accepted Answer · 2011-01-14 20:56:56Z

1

Yes.

But... Klaus Hartl's jQuery cookie plugin (I'm assuming this is the one you are using) defaults to setting the cookie's path to that of the current document. If the PHP file you were trying to echo from was in a different folder, the cookie wouldn't have been sent.

You can set the cookie's path when you set the cookie:

$.cookie('name', val, { path: '/' });

edited Jan 14, 2011 at 20:56

answered Jan 14, 2011 at 20:51

josh3736

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5 Comments

sehummel Over a year ago

Then why do I get an undefined index error on the next page when I try to echo them?

Valera Leontyev Over a year ago

Debug your page's cookies in browser using native tools or some extensions (like Firebug + Firecookie). Check if the cookie was really set in JS. Dump PHP's $_COOKIE array to check all received cookies.

sehummel Over a year ago

I did print_r on the $_COOKIE and the only thing that is there is the CodeIgniter session. Could CI be erasing them? I check Firefox's preferences and they're still there but I can't echo them.

Valera Leontyev Over a year ago

«I check Firefox's preferences and they're still there but I can't echo them» — check cookies path. It's important. Try to set cookie with josh3736's code: $.cookie('name', val, { path: '/' });

josh3736 Over a year ago

@shummel7845: Glad I guessed correctly. Also, keep in mind that the plugin defaults to expiring the cookie at the end of the session (when the browser closes). Add expires: 365 (days) to persist the cookie.

Valera Leontyev · Accepted Answer · 2011-01-14 20:52:12Z

0

The cookies you have in PHP is the same that you have in JavaScript. They are equal. Cookies have some options to set acceess scope, lifetime and so on. If you'll set a cookie for all the domain, it will be seen in PHP.

answered Jan 14, 2011 at 20:52

Valera Leontyev

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2 Comments

sehummel Over a year ago

Could CodeIgniter (which is what I'm using) be erasing them? I am loading a login page immediately after setting them.

Valera Leontyev Over a year ago

I don't know if it could. See josh3736's comment first. Seems it's your case.

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