InterJinn works something like this for it's FormJinn engine. So I'd say
it sounds quite good :)
Cheers,
Rob.
On Wed, 2003-10-01 at 19:43, Chris W. Parker wrote:
> Hey people.
>
> I'm trying to come up with an easy way to validate forms. I've got an
> idea and I'd like your feedback as well as suggestions and/or your own
> methods.
>
> My idea is to have a multi-dimensional array with fields: data and type.
>
> Let's say you have a form with three fields. First Name (fname), Last
> Name (lname), and Phone Number (phone). It's sent to a processing script
> via GET. On the processing script you have the basics:
>
> <? // pseudo code
>
> // collect data
> $fname = (!empty($_GET['fname'])) ? $_GET['fname'] : "" ;
> $lname = (!empty($_GET['lname'])) ? $_GET['lname'] : "" ;
> $phone = (!empty($_GET['phone'])) ? $_GET['phone'] : "" ;
>
> // validate data
> if($fname is not [a-zA-Z]{2,20})
> {
> // mark as error
> }
>
> if($lname is not [a-zA-Z]{2,20})
> {
> // mark as error
> }
>
> $phone = stripOutEverythingButTheNumbers($phone);
>
> if($phone is not [0-9]{10}) // we only sell to US via website
> {
> // mark as error
> }
>
> $_SESSION['form_errors'] = put_the_errors_in_here;
>
> redirect("to_the_previous_page.php"); // where the errors will be read
> // and the fields with bad data
> // will be marked appropriately
>
> ?>
>
> What I'd like to do is get rid of all the if's and what not and throw
> them into a function. What I thought of doing to replace all this is:
>
> <? // pseudo code
>
> $formdata['fname']['data'] = (!empty($_GET['fname'])) ? $_GET['fname'] :
> "" ;
> $formdata['fname']['type'] = "name";
> $formdata['lname']['data'] = (!empty($_GET['lname'])) ? $_GET['lname'] :
> "" ;
> $formdata['lname']['type'] = "name";
> $formdata['phone']['data'] = (!empty($_GET['phone'])) ? $_GET['phone'] :
> "" ;
> $formdata['phone']['type'] = "phonenumber";
>
>
> $_SESSION['form_errors'] = validateFormData($formdata);
>
>
> redirect("to_the_previous_page.php");
>
> ?>
>
> The validateFormDate() function would be defined something like this:
>
> function validateFormData($input)
> {
> foreach($input as $field)
> {
> switch ($field['type'])
> {
> case 'name':
> // do the magic
> break;
> case 'phonenumber':
> // do the magic
> break;
> }
> }
> }
>
>
> The validateFormData() function will return false if there are no errors
> to report.
>
> For a form that has a lot of fields to validate I think this can make
> things pretty easy.
>
>
> So... what do you think?
>
>
>
> Chris.
>
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>
>
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