PHP Signup Form

[system]

Hello so I would like to add this to my php signup form and I am not sure how I can do it here is my signup form code.
[php]

<?PHP $id = md5(rand(6000,99999999999999991000)); ?>

Username
Password
Email Address
Auto-Install Script	Do not install a script WordPress Blog Joomla! CMS Drupal CMS BigAce CMS Nucleus CMS Typo3 CMS B2Evolution Blog & CMS GeekLog CMS Kajona CMS Concrete5 CMS Pivot Blog & CMS TextPattern CMS Tiki Wiki CMS Groupware MODX Revolution CMS Pligg CMS phpBB Forum MyBB Forum Vanilla Forum OpenCart E-commerce Shop OsCommerce E-commerce Shop ZebCart E-commerce Shop HHG MultiStore E-commerce Shop CubeCard E-commerce Shop Web Auction FAQ Master
Site Category	Personal Business Hobby Forum Adult Dating Software / Download
Site Language	English Non-English
Security Code
Enter Security Code

By signing up for <? echo "$yourdomain" ;?> free hosting, you accept and agree to our Terms of Service [/php]

[astonecipher]

The simple explanation is to add it somewhere between the these tags,

Where doesn’t matter.