I've stopped relying upon getmxrr(), there are various reasons why, but what it comes down to is it's not reliable.

If you want to make sure the user has a working e-mail address just send a verification e-mail + activation code.


Also be aware that $_SERVER['HTTP_USER_AGENT']; can change while a user is logged in with some browsers.


You also switch between using boolean values, and doing if conditions and checking for 1 for true.
I'd recommend just using one convention, and maybe even using '===' to check your value and type.



Also, your functions only return strings if there's an error, if you ask me, that's what the $errormessge[] array is for.

Inside of classes you should return a true or false, and then retrieving your output from another getter.

Hope that helps a little.

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Where I Ramble: http://www.iwilldomybest.com/
What I do: Zynga Game Network
Senior Software Engineer at CityVille