form validate

i have a script in php that i use to collect info for a form and just want to know how i can validate the terms variable – so if if they dont tick it the form wont proceed and prompt the user to answer that question…..here is the script i use

<?php
$message = “name = {$_POST[‘name’]}n”;
$message = “address = {$_POST[‘address’]}n”;
$message = “city = {$_POST[‘city’]}n”;
$message = “state = {$_POST[‘state’]}n”;

$message = “postcode = {$_POST[‘postcode’]}n”;

$message = “telephone = {$_POST[‘telephone’]}n”;

$message = “telephone2 = {$_POST[‘telephone2’]}n”;

$message = “email = {$_POST[’email’]}n”;

$message = “day = {$_POST[‘day’]}n”;

$message = “number = {$_POST[‘number’]}n”;

$message = “month = {$_POST[‘month’]}n”;

$message = “year = {$_POST[‘year’]}n”;

$message = “type = {$_POST[‘type’]}n”;

$message = “other = {$_POST[‘other’]}n”;
$message = “venuename = {$_POST[‘venuename’]}n”;
$message = “contact = {$_POST[‘contact’]}n”;
$message = “venueaddress = {$_POST[‘venueaddress’]}n”;
$message = “bookingtime = {$_POST[‘bookingtime’]}n”;
$message = “package = {$_POST[‘package’]}n”;
$message = “Agreedfee = {$_POST[‘Agreedfee’]}n”;
$message = “specialinstructions = {$_POST[‘specialinstructions’]}n”;
$message = “terms = {$_POST[‘terms’]}n”;

mail ( “[email protected]“, “djs-ALIVE function form results”, “Name = $namen address = $addressn city = $cityn state = $staten postcode = $postcoden telephone = $telephonen telephone 2 = $telephone2n email = $emailn Function day = $dayn day of month = $numbern month = $monthn year = $yearn Type of function = $typen other = $othern Name of Venue is = $venuenamen Manager or contact = $contactn Venue address and Phone number = $venueaddressn Booking times = $bookingtimen Which package to you require = $packagen Agreed fee = $Agreedfeen Special Instructions = $specialinstructionsn terms and Conditions = $termsn” , “From: $email”) ;

header( “Location: [url]http://www.djs-alive.com.au/thankyou.htm[/url]” );

?>

Also in #PHP _↴