|
|
Posted by Jerim79 on 11/10/06 21:39
Jerry Stuckle wrote:
> Jerim79 wrote:
> > I am looking into form validation for my HTML form. I don't want to use
> > javascript and was looking into using PHP. A crazy thought crossed my
> > mind and I just wanted to get some input.
> >
> > What if I basically made the form one long if/then statement? I could
> > ask for the first piece of information, test it against some
> > conditions, then if it is okay I allow the user to fill in the next
> > piece of information. I could go do down the page validation each box
> > as we go. I could use hidden on all the text boxes until the previous
> > condition had been validated. Some pseudocode:
> >
> > <?php
> > <form action=POST method=registered.php>
> > <input name"Fname" type="text">
> > if ($Fname meets some condition)
> > {
> > <input name="Lname" type="text">
> > if ($Lname meets some condition)
> > {
> > <input name="Number" type="text>
> > if ($Number meets some condition)
> > {
> > }
> > }
> > }
> > else;
> > echo "Please enter a phone number";
> > else;
> > echo "Please enter a valid last name";
> > else;
> > echo "Please enter a valid first name";
> > ?>
> >
> > I know the code isn't exact, I am just theorizing here. Could such a
> > thing be done? Even remotely similar? I don't really plan on doing this
> > anytime soon, but I was just curious. I only started PHP programming a
> > few days ago so no need to point out how stupid this may sound.
> >
>
> Jerim,
>
> Yes and no.
>
> First of all, the PHP code will be executed before the page is ever sent
> to the client. It's not interactive like javascript is.
>
> So what you do is have the user complete the form and submit it. Your
> code should then validate all fields. But you don't want to nest your
> statements like that - for instance, what happens if they don't enter
> either a first name or a phone number? They'll get a single message
> which they correct - and they'll get a second message.
>
> Rather, process each field individually, i.e.
>
>
> $emsg = '';
> if ($fname = '') // No first name
> $emsg .= "Please enter a first name.<br>\n";
> if ($lname = '') // No last name
> $emsg .= "Please enter a last name.<br>\n";
> if ($phone = '') // No phone number
> $emsg .= "Please enter a phone number<br>\n";
>
> ...
>
> if ($emsg != '')
> echo $emsg;
>
>
> --
> ==================
> Remove the "x" from my email address
> Jerry Stuckle
> JDS Computer Training Corp.
> jstucklex@attglobal.net
> ==================
Thanks for the info, it was very useful and informative.
Navigation:
[Reply to this message]
|