In need of a bit of help.. PHP/MySQL related

[just.b.jealous]

Thanks for helping me out by the way--

Yup- just to control how many times they click it in an hour..

Main page is index.html- this page has the link needing to be limited... regular page with a button on it.

<div class="newest-item">
	<div class="newest-img"><img src="uploads/items-here/47-plastic-chair-3.png" alt="Plastic Chair" width="120" height="120"/></div>
	<div class="newest-desc"><p>Plastic Chair</p></div>
	<a class="add-cart" href="./forms/form1.html" title="Enter for you chance to win!"><span>Enter Email</span></a>
</div>

clicking it takes you to ./forms/form1.html (this page is a simple email form which submits/post to form1.php:

<?php
	if(isset($_POST['email'])) {
		$email_to = "contact@mail.com"; // YOUR EMAIL ADDRESS
		$email_subject = "[_ENTRY_]";    // THE EMAILS SUBJECT
		function died($error) {
			echo "We are very sorry, but there were error(s) found with the form you submitted. ";
			echo "These errors appear below.<br /><br />";
			echo $error."<br /><br />";
			echo "Please go back and fix these errors.<br /><br />";
			die();
		}
		if(!isset($_POST['email'])) {
			died('We are sorry, but there appears to be a problem with the form you submitted.');      
		}
		$email_from = $_POST['email'];
		$error_message = "";
		$email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';
		if(!preg_match($email_exp,$email_from)) {
			$error_message .= 'The Email Address you entered does not appear to be valid.<br />';
		}
		if(strlen($error_message) > 0) {
			died($error_message);
		}
		$email_message = "Form details below.\n\n";
		function clean_string($string) {
			$bad = array("content-type","bcc:","to:","cc:","href");
			return str_replace($bad,"",$string);
		}
		$email_message .= "Email: ".clean_string($email_from)."\n";
		$headers = 'From: ' . $email_from . "\r\n".'Reply-To: ' . $email_from."\r\n" . 'X-Mailer: PHP/' . phpversion();
		@mail($email_to, $email_subject, $email_message, $headers); 
?>
<!-- ############################################################################################# -->
<!-- ##################### BEG: Provide your custom HTML or use what's there ##################### -->
<!-- ############################################################################################# -->
<?php
header("Location: http://site.com/");
?>
<!-- ############################################################################################# -->
<!-- ##################### END: Provide your custom HTML or use what's there ##################### -->
<!-- ############################################################################################# -->
<?php
	}
?>

After emailing- it takes them to the homepage.