Form Validation filter - Regex Q

[Haig Davis <level510@xxxxxxxxx>]

 Morning All,

I've been figthing with this little problem for two days now, so far no luck
with google and am beginning to question my own sanity.

I have a application that has over one hundred forms some quite lengthy so
what I'm trying to achieve rather than writing a bunch of individual
sanitize statements then form validation statemenst that I could run $_POST
through a foreach loop and filter the values by form class i.e.is it an
emaill addreess or simply a text block with letters and numbers. The regex's
alone work fine as does the foreach loop the only issue I have is the IF
statement comparing $key to expected varieable names.

Heres the bit of code envolved.

if(isset($_POST['submit'])){
        foreach($_POST as $keyTemp => $valueTemp){
            $key = mysqlclean($keyTemp);
            $value = mysqlclean($valueTemp);
            $$key = $key;
            $$key = $value;

            if($key != ("$customerServiceEmail") || ("$billingEmail") ||
("$website")){
                if(preg_match("/[^a-zA-Z0-9\s]/", $value)){
                    $style = "yellow";
                    $formMsg = "Invalid Characters";
                    $bad = $key;

                }
            }
            if($key = ("$customerServiceEmail") || ("$billingEmail")){

if(preg_match("/^([a-zA-Z0-9._%-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4})*$/",
$value)){
                    $style = "yellow";
                    $formMsg = "Invalid Characters";
                    $bad = $key;
                }
            }

        }
}

Thanks for taking a peek.

Haig