PHP contact form with spam check and honeypot features.

addon-contact-form.php

<?php if(!isset($_POST['send'])) { ?>
	<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
		<noscript><input type="hidden" name="havejs" id="havejs"></noscript>
		<input type="hidden" name="send" value="send">
		<!-- spam bait - if the bcc field contains anything, this email is rejected -->
		<!--<input type="text" name="bcc" />-->
		<!--<label for="bcc">Bcc</label>-->

		<p><input type="text" name="name" required><label for="name">Name</label></p>
		<p><input type="text" name="phone" required><label for="phone">Phone</label></p>
		<p><input type="email" name="email" required><label for="email">Email</label></p>
		<p><textarea name="message" required></textarea><label for="message">Message</label></p>
		<p><input type="submit" value="Send message"></p>
	</form>
<?php
}

if(isset($_POST['send'])) {
	// extra check for non-HTML pages/browsers
	function chip_get_my_valid_email($email) {
		return preg_match('#^[a-z0-9.!\#$%&\'*+-/=?^_`{|}~]+@([0-9.]+|([^\s]+\.+[a-z]{2,6}))$#si', $email);
	}
	function chip_get_my_bot() {
		$bots = array("Indy", "Blaiz", "Java", "libwww-perl", "Python", "OutfoxBot", "User-Agent", "PycURL", "AlphaServer", "T8Abot", "Syntryx", "WinHttp", "WebBandit", "nicebot", "Teoma", "alexa", "froogle", "inktomi", "looksmart", "URL_Spider_SQL", "Firefly", "NationalDirectory", "Ask Jeeves", "TECNOSEEK", "InfoSeek", "WebFindBot", "girafabot", "crawler", "www.galaxy.com", "Googlebot", "Scooter", "Slurp", "appie", "FAST", "WebBug", "Spade", "ZyBorg", "rabaz");
		foreach($bots as $bot)
			if(stripos($_SERVER['HTTP_USER_AGENT'], $bot) !== false)
				return true;
			if(empty($_SERVER['HTTP_USER_AGENT']) || $_SERVER['HTTP_USER_AGENT'] == " ")
				return true;
		return false;
	}
	function chip_get_my_clean_string($string) {
		$bad = array('content-type', 'bcc:', 'to:', 'cc:', 'href');
		return str_replace($bad, '', $string);
	}
	function chip_get_my_ip() {
		if(!empty($_SERVER['HTTP_CLIENT_IP']))
			$ip = $_SERVER['HTTP_CLIENT_IP'];
		elseif(!empty($_SERVER['HTTP_X_FORWARDED_FOR']))
			$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
		else
			$ip = $_SERVER['REMOTE_ADDR'];
		return $ip;
	}

	$bcc 		= filter_var($_POST['bcc'], FILTER_SANITIZE_STRING);

	$name 		= filter_var($_POST['name'], FILTER_SANITIZE_STRING);
	$phone 		= filter_var($_POST['phone'], FILTER_SANITIZE_STRING);
	$email 		= filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);

	$message 	= filter_var($_POST['message'], FILTER_SANITIZE_SPECIAL_CHARS);
	$message 	= filter_var($_POST['message'], FILTER_SANITIZE_STRING);

	$name 		= chip_get_my_clean_string($name);
	$phone 		= chip_get_my_clean_string($phone);
	$email 		= chip_get_my_clean_string($email);
	$message 	= chip_get_my_clean_string($message);

	// HEADERS
	$headers = 'MIME-Version: 1.0' . "\r\n";
	$headers .= 'Content-type: text/html; charset=utf-8' . "\r\n";

	// Additional headers
	$headers .= 'To: Recipient Name <info@domain.com' . "\r\n";
	$headers .= 'From: Sender Name <info@domain.com>' . "\r\n";

	$headers .= 'Reply-To: info@domain.com' . "\r\n";
	$headers .='X-Mailer: PHP/' . phpversion();

	$subject = "Your Email Subject Here";
	$mail = "recipient@domain.com";

	$message=' 
		<strong>Name:</strong> ' . $name . '<br>
		<strong>Phone:</strong> ' . $phone . '<br>
		<strong>Email:</strong> ' . $email . '<br>
		<strong>Message:</strong> ' . $message . '<br><br>
		Message sent from http://www.domain.com/<br><br>
		==<br>
		<small><strong>Sender IP:</strong> ' . chip_get_my_ip() . '</small><br>
		<small><strong>Sender Browser:</strong> ' . $_SERVER['HTTP_USER_AGENT'] . '</small><br>
		<small><strong>Sender OS:</strong> ' . $_SERVER['SERVER_SOFTWARE'] . '</small>
	';

	if($bcc == '' && !isset($_POST['havejs']) && $name != '' && $email != '' && $message != '' && chip_get_my_valid_email($email) && $_SERVER['REQUEST_METHOD'] == 'POST' && chip_get_my_bot() == false) {
		mail($mail, $subject, $message, $headers);
		echo '<p>Message sent!</p><p>Thank you!</p>';
	}
	else {
		echo '<p>Error!</p><p>Please fill in all fields!</p>';
	}
}
?>

Added this to a test page and everything after . "\r\n"; on line 149 shows as text. Obviously my fault but would like to know how to fix it.