Re: Form Validation filter - Regex Q

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Haig Davis wrote:
 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


Sorry about the misreading your request, earlier.

Here is a function that I use.

function checkEmailAddr($emailAddr)
{
    if(empty($emailAddr))
    {
        throw new Exception("No email address provided");
    }

    if(!preg_match("%\w+@%", $emailAddr))
    {
throw new Exception("Email address missing mailbox name, or syntax is wrong. ");
    }

    if(!filter_var($emailAddr, FILTER_VALIDATE_EMAIL))
    {
        throw new Exception("Email address error. Syntax is wrong. ");
    }
    $domain = substr(strchr($emailAddr, '@'), 1);
    if(!checkdnsrr($domain))
    {
throw new Exception("Email address warning. Specified domain \"$domain\" appears to be invalid. Check carefully.");
    }
    return true;
}

Use the function like this

try{
	checkEmailAddr($userSubmitedDataArray[EMAIL_ADDR_FIELD]);
}

catch (Exception $e)
    {
        $userErrorMsg = $e->getMessage(); //Message text in check function
    }


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