php help, form submission problems, please help

[ljackson]

Hi all,

 

ok i have a webpage with a form on it which contains an image validator

 

what i want to happen is if the validator is incorrect then a varible value is changed and displayed on the current page underneath the input box telling the user that they entered an incorrect code, and if they entered a correct code i want the page to redirect to the previous page before the rate.php page

 

i am currently having trouble getting any message to appear when incorrectly entered and when its correctly entered i get

Warning: Cannot modify header information - headers already sent by

 

here is my rate.php code

<?php 
session_start();
ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(E_ALL);
require('functions.php'); 
require('_drawrating.php');
include_once('db101.php');?>




Kernow Connect









$message101="";
if( isset($_POST['submit'])) {
  if( $_SESSION['security_code'] == $_POST['security_code'] && !empty($_SESSION['security_code'] ) ) {
       // Insert you code for processing the form here, e.g emailing the submission, entering it into a database. 
       $sql="UPDATE ratings 
 SET 
   used_ips = NULL,
   total_value = 0,
   total_votes = 0 
 WHERE 
 id IN ('valuetemp', 'easeofusetemp', 'deliverytemp', 'delchargetemp')";
 $query = mysql_query($sql);
 header('index.php');

       unset($_SESSION['security_code']);
  } else {
       // Insert your code for showing an error message here
       $message101 ="Please enter the above code";
  }
} else {
?>




//Database info included in include

Toplinks();
print "

";



?>



Value for moneyEase of useDelivery timeP&P costs     Please Enter Security Code:  

 

any help is appreciated

cheers

Luke

Edited March 30, 2009 by ljackson

[jlhaslip]

The issue is that you are outputting some html before the Header is written.

Try moving the php if statement above the HTML code for the page, or use ob_start().

 

That should work.

[ljackson]

thanks mate, all sorted now

 

many thanks

Luke