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I’m using the facebook login button on my site and it’s working just fine. But, for my site, I use the require_once function to include my header.php file on every page. I know that the site url that’s listed on my app setting on fb has to match the page that’s has the login button. Is it possible to have the facebook login button on multiple pages? Thanks.
When you edit your app in developer.facebook.com, you can add app domains. These are domains you can auth from, so you could do example.com and www or www2 or just example.com would allow auth. But you asked about having “login button” from any page, as long as you are not changing domains it should not be a problem. 🙂