Pattern matching Phone, Email

This is driving me nuts.


I am trying to validate a form, phone numbers, and the phone number has to be "xxx xxx-xxxx"

Here is my pattern "^([0-9]{3})( [0-9]{3})([0-9]{4})$"


my code:


function VALIDATE_USPHONE($phonenumber)
{
if ((preg_match("^([0-9]{3})( [0-9]{3})([0-9]{4})$", $phonenumber)) == TRUE ) {
return $phonenumber;
} else {
return false;
}
}

VALIDATE_USPHONE(trim($_POST[Home_Phone]));
if ($phonenumber) {
$account['HOME_PHONE'] = trim($_POST[Home_Phone]);
}




Also, if any one want to suggest a pattern for email, I'd take that too.