Simple WordPress Contact Form

gistfile1.phtml

<?php
if($_POST['submit'] == 'Submit') {
	//prevent injection
	if (!isset( $_POST['contact_form_nonce'] ) || ! wp_verify_nonce( $_POST['contact_form_nonce'], 'submit_contact_form' ) ) {
		print 'Sorry, your nonce did not verify.';
		exit;
	}
	//prevent spam
	if(isset($_POST['foo']) && trim($_POST['foo']) != '') {
		print 'Sorry, your submission has failed.';
		exit;
	} 
	//process form data
	else {
		$name = $_POST['contact-form-name'];
		$email = $_POST['contact-form-email'];
		$message = $_POST['contact-form-message'];
		if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
			$subject = 'Contact Form Submission';
			$headers = 'From: '.$name.' <'.$email.'>' . "\r\n";
			$to = get_option('admin_email');
			wp_mail( $to, $subject, $message, $headers, $attachments );
			echo 'Thank you. Your message has been successfully submitted.';
		} else {
			echo '<style>.contact-form-input-email label {color: #FF0000; font-weight: bold;} .contact-form-input-email label:before {content: "*";} .contact-form-input-email:after {content: "Please enter a valid email address";}</style>';
		}
	}
} else {
?>
<form method="post">
	<div class="contact-form-input-name">
		<label for="contact-form-name">Full Name:</label>
		<br>
			<input id="contact-form-name" name="contact-form-name" type="text" />
	</div>
	<div class="contact-form-input-email">
		<label for="contact-form-email">Email:</label>
		<br>
			<input id="contact-form-email" name="contact-form-email" type="text" />
	</div>
	<div class="contact-form-input-message">
		<label for="contact-form-message">Message:</label>
		<br>
			<textarea rows="4" cols="100" id="contact-form-message" name="contact-form-message"></textarea>
	</div>
	<br>
	<?php wp_nonce_field('submit_contact_form','contact_form_nonce'); ?>
	<div id="fooDiv">
		<label for="foo">Leave this field blank</label>
			<input type="text" name="foo" id="foo">
	</div>
	<script>
		(function () {
		    var e = document.getElementById("fooDiv");
		    e.parentNode.removeChild(e);
		})();
	</script>
	<input type="submit" id="submit" name="submit" value="Submit"></input>
</form>
<?php } ?>