Validate Forms

[Anon]

Hi, I'm currently doing my attachment with a small company and i have a problem: i need to find PHP codes to validate forms. Just like, say when you fill in a form on the net wrongly, the server will prompt you and tell you that certain fields are not filled in correctly. I have tried searching a few web sites but most of them use cgi but i need the code in PHP! Please assist! Thanks a million 🙂

[bibie]

Hi, you could use client side scripting as JavaScript, or use regular expression to validate string input.
For JavaScript, try visit www.zend.com, when you face registration page, view its source, and you'll find nice form validation

[[deleted]]

It is really quite easy.

What you want is a form that you can fill in and submit.
Then when the user forgets to fill out a field, you want to tell the person that that field needs to be filled.
But, you also want to offer the form to the user again, with all the previously filled out fields already filled, so the user only has to add the missing data to it.
You'd use one script that can
a) print the empty form
b) receive submitted data and store it
c) receive submitted data and print the form again with data .

In pseudo code:

• Start the script
• Check if the user has submitted data to this script
• If no data was submitted, set the $check_fields to 0; and print the form.
• If data was submitted:
  -- Check if any field data is missing.
  -- If there is data missing, set the $check_fields to 1 and print the form.
  -- If all fields are filled, process the data and exit.

The Pre-filled out form would look like this:

<?
echo "<input name=bla value=$submited_value>";
if (($check_fields) && ($submitted_value==""))
{
echo "You must fill out this field";
}
... etc for all fields.
?>

[Anon]

validating form data with JS is only for the conveniece of the user, but its never a replacement for php form validation before using the data !!
What if the user turns off JS (or has it turned off), or if the user pumps the data directly into your Script skipping your JS ??? Never ever relay on JS for form validation !!
cheers
Rob

[Anon]

Sue,

validating with php is quite easy...

This is a brief example:

1. Your form
   <form method=post action=$PHP_SELF>
   <input type=text name=first_name>
   <input type=text name=last_name>
   <input type=submit name=enter value=Submit>
   </form>
2. Php Code
   if($enter)
   {
   if(($first_name&&last_name)="")
   {
   echo "Please go back and fill the rest of the form..";
   exit();
   }
   //If form is correct then some code goes below.
   }

Hope that helps,

Di

[Anon]

One more thing...

If you want to check if e-mail address was filled correctly, and etc. than go to <b>www.php.net</b> and check string functions.

Di