This is a domain register script
Here's the output for an available domain, with a Register button next to it
echo
'<h5 class="available">
<span>Available</span>
' . $domain. '<b>' . $extension .'</b> is available!
</h5>
<a href="register-form.php">Register</a>';
That <a href="register-form.php">Register</a>
should send register-form.php the chosen domain and extension informations, and fill it in the text input
Formulary that holds the <input id="domain" type="text" />
and that needs to be filled with the functions mentioned above /\ , with both domain and extension
Full process.php code available by clicking the title of this question, /\ above
You can 'fill' your input field with value="your value here"
You can fill your input field server side with some GET variables like so: value="<?php echo $variable;?>"
Now it's up to you how you can get the register button to send a GET variable to the register form.php.
Try googling, as this is basic knowledge; and you need to show us some effort your self.
edit You can do it with a form as described above, but that's not the only way. You could change the link behind your 'register' text to register-form.php?ext=domainA.com
:
echo
'<h5 class="available">
<span>Available</span>
' . $domain. '<b>' . $extension .'</b> is available!
</h5>
<a href="register-form.php?ext='.$domain.$ext.'">Register</a>';
In your other page you should do something like:
$url = do_some_type_checkingAndChecks($_GET['ext']);
<input id="domain" type="text" value='<?php echo $url;?>'/>