contact-form.php

<?php
// BEGIN CONFIGURATION ////////////////////////////////////////////////

define('EMAIL_TO', 'your-email@address.com');
define('EMAIL_SUBJECT', 'Test Subject');
define('CAPTCHA_ENABLED', '1'); // 0 - Disabled, 1 - Enabled

// END CONFIGURATION ////////////////////////////////////////////////

define('CAPTCHA1', rand(1,9));
define('CAPTCHA2', rand(1,9));

if ($_POST) {
	$name = $_POST['name'];
	$email = $_POST['email']; 
	$message = $_POST['message'];
	$captcha = $_POST['captcha'];
	$captcha1 = $_POST['captcha1'];
	$captcha2 = $_POST['captcha2'];

// If captcha disabled, set variable values to avoid error
	if (CAPTCHA_ENABLED == '0') { $captcha1 = '1'; $captcha2 = '1'; $captcha = '2'; }

// Error handling
	if (empty($name) || empty($email) || empty($message)) { $msg = 'One or more fields is blank!'; }
	else if (!$email == '' && (!strstr($email,'@') || !strstr($email,'.'))) { $msg = 'Your email address is not formatted correctly!'; }
	else if (($captcha1 + $captcha2) != $captcha) { $msg = 'Anti-spam incorrect! Please try again.'; }

// Build email headers
	else {
		$headers = "From: ".$name." <".$email.">\r\n";
		$headers .= "Reply-To: ".$name." <".$email.">\r\n";
		$headers .= "MIME-Version: 1.0\r\n";
		$headers .= "Content-Type: text/html; charset=UTF-8\r\n";

// Build email body
		$body = '
		<html><body>
		<table border="0" cellspacing="0" cellpadding="0" width="100%">
		<tr><td style="border-bottom: solid 1px #CCC; font-size:18px; font-weight:bold; padding:10px;" colspan="2">'.$email_subject.'</td></tr>
		<tr><td valign="top" style="padding:10px; border-bottom: solid 1px #CCC;" valign="top"><b>Name:</b></td><td style="padding:10px; border-bottom: solid 1px #CCC;">'.$name.' ('.$email.')</td></tr>
		<tr><td valign="top" style="padding:10px; border-bottom: solid 1px #CCC;" valign="top"><b>Message:</b></td><td style="padding:10px; border-bottom: solid 1px #CCC;">'.$message.'</td></tr>
		</table>
		</body></html>
		';

// Send the email, reset text boxes on form, and show success message
		mail(EMAIL_TO, EMAIL_SUBJECT, $body, $headers);
		$name = '';
		$email = '';
		$message = '';
		$msg = 'Message Sent!';
	}
}
?>

<!DOCTYPE HTML>
<html>
<head>
</head>
<body>

<?php echo $msg; ?>

<form method="post">
<p>Name:<br><input type="text" name="name" value="<?php echo $name; ?>"  /></p>
<p>Email:<br><input type="text" name="email" value="<?php echo $email; ?>" /></p>
<p>Message:<br><textarea name="message" rows="5" cols="40" /><?php echo $message; ?></textarea></p>
<?php if (CAPTCHA_ENABLED != '0') { ?>
<p><?php echo CAPTCHA1; ?> + <?php echo CAPTCHA2; ?> = ?<br><input type="text" name="captcha" /></p>
<input type="hidden" name="captcha1" value="<?php echo CAPTCHA1; ?>" />
<input type="hidden" name="captcha2" value="<?php echo CAPTCHA2; ?>" />
<?php } ?>
<p><input type="submit" value="Submit" /></p>
</form>

</body>
</html>