Check form data

fabiuz

Hi,

I am looking for a fast and easy way to check the data tyoed in a form by users.

In other words, I would like only to know if they have filled out all the required fields and at last that they have typed text where should be text, and numbers where there should be numbers. Also an e-mail address check could be good.

The thing I am looking for, should also show the same page with the same data if an error occours, and should put a red label or a description beside the wrong typed fild.

Do you have any suggestion about !?

Thank you

Fabio

bonehooray

Well, if you have three different form inputs, one called $name, one called $email and one called $password, you can simply do this:

if (!$username || !$password || !$email) and then add the appropriate action, perhaps an error message. Just use "else" to process the form, cuz in case of else, he filled inn all the fields.

To get an email validation code, go to the PHP/MySQL article on hotwired.lycos.com/webmonkey. On the last or second last page or something, there's a code that checks for the @ and the . afterwards or something. It's a decent check.

Bye

Fabio wrote:

Hi,

I am looking for a fast and easy way to check the data tyoed in a form by users.

The thing I am looking for, should also show the same page with the same data if an error occours, and should put a red label or a description beside the wrong typed fild.

Do you have any suggestion about !?

Thank you

Fabio

abelajohnb

Check out:

http://www.thewebmasters.net/php/Validator.phtml

It might be a bit complicated if you aren't familure with PHP all that much.

But, if nothing else... you can get some valuable code from it, that you might be able to apply.

For you 'empty' fields, check out:
http://www.php.net/manual/en/function.empty.php

For your email address validator check out:
http://www.4cm.com/tips/index.php?action=show&id=16

This should just about take care of it for you.

JbA

jc94062

Those empty fields? Wouldn't a much simpler and faster way be...

if ($username == "") {echo "Error";}

laurabrandt

To check whether the format of a field is valid (whether it's numbers only or text only) you can try using regular expression in PHP. Check out http://www.phpbuilder.com/columns/dario19990616.php3 for a very good tutorial on regex.

The tutorial also states the code that you can use to check for valid email address.

Hope this helps.

Laura Brandt

Aletia Hosting - Full-Featured, Superfast Web Hosting
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abelajohnb

To some it may be easier.

Let's compare:

if($username==""){die echo"Error";};
if(!$empty($username)}{die("Error")};

So, I guess, your one character less than the more proper way to do it.

While EMPTY() does have it's disadvantages, it also has it's strengths.

I've just always felt that:

if (!$empty($name)}
{
die("Error")
};

is a much more professional way to code it, compared to:

if ($username == "")
{
echo "Error";
};

But, heck, either way... if all your doing is checking to see if a value is empty... use whichever you like 🙂

Later.
JbA