How to implement captcha in php?

Hi Sanjay,

If u want to implement captcha with php, u need to follow these steps....

1) Make a PHP script

2)2) Add the following line at the top of the page where you need to implement CAPTCHA:
<?php session_start() ?>

3) Add the following line to check whether the CAPTCHA string entered by the visitor is valid, before the line where you will proceed with a submitted message:
<?php
if($_SESSION["captcha"]==$_POST["captcha"])
{
//CAPTHCA is valid; proceed the message: save to database, send by e-mail ...
}
?>

4) Finaly add the CAPTCHA to the form.


Try these steps & If any query let me know....


Regards,
Riju.