Visual Confirmation System

Submitted by GHS, Mar 2007.

This tutorial will explains how to put a visual confirmation in your register form.

In somewhere on page of form, add:

Code:

<?php
 
/* generating the random number */
 
$rand = rand(11111,99999);
 
/* generating the image */
 
if (isset($_GET['mode'] && $_GET['mode'] == 'image')
 
{
 
  session_start();
 
  $_SESSION['code'] = md5($rand);
 
  $img = imagecreate(50, 20);
 
  $bkg = imagecolorallocate($img, 0, 0, 0);
 
  $color = imagecolorallocate($img, 255, 255, 255);
 
  imagestring($img, 5, 2, 2, $rand, $color);
 
  header('Content-type:image/gif');
 
  imagegif($img);
 
  imagedestroy($img);
 
  exit;
 
}
 
?>
 
<fieldset>
 
  <legend>Visual Confirmation</legend>
 
  <div style="float:left"><input type="text" name="visualconfirm" value="" /></div>
 
  <div style="float:right"><img src="index.php?mode=image" alt="" /></div>
 
  <div style="clear:both"></div>
 
</fieldset>

Now in other file (specified on <form action="HERE"...> before the fields of form) add:

Code:

<?php
 
session_start();
 
$field = isset($_POST['visualconfirm']) ? $_POST['visualconfirm'] : '';
 
if (md5($field) == $_SESSION['code'])
 
{
 
  // action doed if confirmation code filled on field is correct
 
}
 
else
 
{
 
  // action doed if confirmation code filled on field is incorrect
 
}
 
?>

P.S.: Don't forgot that you must put the submit button in your form.

Visual Confirmation System

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