Server-side verificatoin?

[marcebra]

Hi,

Is it possible to make a server-side verification (versus a client-side like javascript) that checks if the form is submited nicely on a multi-page form?

My form is split up into 3 steps... step 1 product, 2 name, 3 credit card info. I was wondering if there is a way I could tell if the people submited all the information correctly for the name before going on to the credit card page. I was thinking about making the action for php_self, but then how will i get it to move to the next step?

I know that some websites highlight fields you didnt' do correctly in red an give a message on the top of the page. How do I add that to it too?

Thanks in advance

[dalecosp]

Absolutely possible.

For verification, use something like ereg().

function ValidateInput($var, $type) {

    trim($var);
    if ($type=="name") { $Pattern = "^[A-Z][c]?[A-Z]?[a-z]+[a-z]$"; }
    elseif ($type=="email") { $Pattern = "^([0-9a-z]+)([0-9a-z\._-]+)@([0-9a-z\._-]+)\.([0-9a-z]+)"; }
    elseif ($type=="phone") { $Pattern = "^([0-9]{3})-([0-9]{3})-([0-9]{4})"; }
    $valid=ereg($Pattern, $var);
    return $valid;

}

You can do it all on one form. Send a different value to the script for each portion of the form submitted, then simply test for that variable. Here's the conditional tests for an entire paging routine built into one script:

if (!$submit)

//initial submission of form info here...

elseif (($submit) && (!($sendmsg))) 

// verification of name, address, etc., here

elseif (($ValidCustomer=="1") && (!$sendmsg)){ 

// input of message here

elseif (($submit) && ($sendmsg=="yes"))

// message functions called here

[batman]

Here you go.

//edit and / or add what you want to this

if((!$first_name) || (!$last_name) || (!$email_address) || (!$username)){
	echo 'You did not submit the following required information! Fields that you missed are highlighted<br />';
	if(!$first_name){
                                 $first_name = "";
		echo "First Name is a required field. Please enter it below.<br />";
	}
	if(!$last_name){$last_name = "";
		echo "Last Name is a required field. Please enter it below.<br />";
	}
	if(!$email_address){$email_address = "";
		echo "Email Address is a required field. Please enter it below.<br />";
	}
	if(!$username){$username = "";
		echo "Desired Username is a required field. Please enter it below.<br />";
	}
	include 'login.php'; 
	exit();
}

Then for the login.php page do something like this:

Where the form says First Name then has a text box beside it, do this.

Replace First Name with this:

<?
if($first_name == "")
{
echo "<span style=\"background-color: #FF0000\"><font color=\"#FFFF00\">First Name</font></span>";
}
else
{
echo "First Name";
}
?>

See if that's what your wanting.

[dalecosp]

Originally posted by marcebra
I know that some websites highlight fields you didnt' do correctly in red an give a message on the top of the page. How do I add that to it too?

Thanks in advance

I forgot that last part. You'll have to have the checking script 'mark' the fields somehow --- perhaps a session variable called 'namewrong' or 'addresswrong' and then use conditionals in the form:

if ($_SESSION['namewrong']) {
   echo "<font color=red>Your name: <input type=text name=name></font>";
}
else {
   echo "Your name: <input type=text name=name>";
}

[marcebra]

thanks for the help,

but I'm sort of confused. I'm not sure what page you are refering to when you say "login.php". Is that the step 2?

I'm not worried about verifying step 1, I need the verifier for step 2 going on to step 3. On which pages do I put each script?

Also, is there a website that has all the verification scripts on it -- ie is alpanumeric, only numbers, credit card number checker, and so on?

Thanks again

[batman]

Ok...step 2 page will be this (But modified to be your own).

//Wherever there is like first name, last name, etc.
//replace it with this

<? 
if($first_name == "") 
{ 
echo "<span style=\"background-color: red\"><font color=\"white\">First Name</font></span>"; 
} 
else 
{ 
echo "First Name"; 
} 
?>

Then have the step 2 page's action point to step 3's page. Then this is what we'll have on step 3.

//edit and / or add what you want to this 

$first_name = $_POST['first_name'];
$last_name = $_POST['last_name'];
$email_address = $_POST['email_address'];
$username = $_POST['username'];

if((!$first_name) || (!$last_name) || (!$email_address) || (!$username)){ 
    echo 'You did not submit the following required information! Fields that you missed are highlighted<br />'; 
    if(!$first_name){ 
                                 $first_name = ""; 
        echo "First Name is a required field. Please enter it below.<br />"; 
    } 
    if(!$last_name){$last_name = ""; 
        echo "Last Name is a required field. Please enter it below.<br />"; 
    } 
    if(!$email_address){$email_address = ""; 
        echo "Email Address is a required field. Please enter it below.<br />"; 
    } 
    if(!$username){$username = ""; 
        echo "Desired Username is a required field. Please enter it below.<br />"; 
    } 
    include 'login.php';  

    exit(); 
}

//then the rest of step 3's page here