Adding validation to existing form mailer

Hi all,

I have a form mailer script which I have used many times along with jquery validation. I have had recent spamming issues so I would like to add some server side validation to back the javascript up.

This is the PHP (also attached)

#                           Universal PHP mailer script
#  Date: 05/05/05
#  Written by: Some Guy
#  Email: [email][/email]


#------------------------------- Set the intial variables below ------------------------------#

$to = "";	// This is the recipients email address

$from = "name@email.comk";          // this appears in the from field must be in email format
$subject = "Contact from the website";          // This is the email subject header

$forward = 1;  // 1= web forwarding on 0 = forwarding off
$location = "thankyou.php";     // enter forwarding address here e.g. "thankyou.htm"

$formMsg = "Someone has filled in the contact form on the website, the results are below.";   //This message appears in the top cell

$colour1 = "#D6C6FC";                      // Insert a colour in here for the top cell of the table
$colour2 = "#E1D6FD";                      // Insert a colour in here for the left cells
$colour3 = "#E8DFFD";                      // Insert a colour for the right cells
$textcolour = "#444444";                   //insert a value for text colour
$textsize = "13";                          //text size in pixels

$logoUrl = "";		// Absolute URL for logo image top left
$logoAlt = "Company name";		//alt tag on logo

//------------ Do not Edit below this line unless you know what you are doing ----------------#

$date = date ("l, F jS, Y");
$time = date ("h:i A");

$msg = "<html><head><style type='text/css'>td {font-family: Arial, Helvetica, sans-serif;font-size: $textsize px; color: $textcolour;text-decoration: none;}</style></head><body><div align=center><table border=0 cellpadding=10 cellspacing=1 width=500>";
$msg .= "<tr><td colspan=2 width=400 bgcolor='white' align=left valign=top><img src=\\"$logoUrl\\" alt=\\"$logoAlt\\"></td></tr>";
$msg .= "<tr><td colspan=2 width=400 bgcolor='$colour1'><b>$formMsg</b> <br>This form was submitted on $date at $time.<br></td></tr>";

	foreach ($_POST as $key => $value) {
		$msg .= "<tr><td width=150 bgcolor='$colour2' align=left valign=top>".ucfirst ($key) ."</td><td width=250 bgcolor='$colour3' align=left valign=top>". $value . "</td></tr>";
else {
	foreach ($_GET as $key => $value) {
		$msg .= "<tr><td width=350 bgcolor='$colour2' align=left valign=top>".ucfirst ($key) ."</td><td width=250 bgcolor='$colour3' align=left valign=top>". $value . "</td></tr>";

$msg .= "</table></div></body></html>";

$headers = "From: $from\\r\

// specify MIME-Version 1.0
$headers .= "MIME-Version: 1.0\\r\

//unique boundary
$boundary = uniqid("KCMAIL");

//tell e-mail client this email contains alternative versions
$headers .= "Content-Type: multipart/alternative".
	"; boundary = $boundary\\r\

//mesage to non mime type browsers
$headers .= "This is a MIMe encoded message. Please update your email browser.\\r\

//plain text version of message
$headers .= "--$boundary\\r\
	"Content-Type: text/plain; charset=ISO-8859-1\\r\
" .
	"Content-Transfer-Encoding: base64\\r\
$headers .= chunk_split(base64_encode("This is the plain version"));

//Html version
$headers .= "--$boundary\\r\
" .
	"Content-Type: text/html; charset=ISO-8859-1\\r\
" .
	"Content-Transfer-Encoding: base64\\r\
$headers .= chunk_split(base64_encode($msg));

mail($to, "$subject", "", $headers);
if ($forward == 1) {
    header ("Location:$location");
else {
    echo "Thank you for submitting our form. We will get back to you as soon as possible.";


This is the HTML

<form id="enquiry" name="enquiry" action="mailer.php" method="post" class="bodyform">
          <h2>Get in touch</h2>

          <p>If you've got any questions or feedback, just drop us an email and we'll get back to you as soon as we can.</p>
			<p>All fields are required</p>
              <label for="name">Your name:</label>
              <input type="text" name="name" value="" id="name" class="required">

              <label for="email">Your email:</label>
              <input type="text" name="email" value="" id="email" class="required">
              <label for="message">Your message:</label>
              <textarea id="message" name="message" rows="8" cols="40" class="required"></textarea>

          <p class="submit">
            <input type="submit" value="Submit &raquo;">

Any help would be appreciated.