PHP - Problema al añadir nuevos campos a formulario PHP

<?php

// CONFIGURATION --------------------------------------------------------------

// This is the email where the contact mails will be sent to. 

// In WordPress Edition, it will be done via the theme admin. You don't need to modify this file under WP Edition.

$config['recipient'] = isset($_POST['c_email']) ? trim($_POST['c_email']) : '';

// This is the subject line for contact emails.

// The variable %name% will be replaced with the name of the sender.

$config['subject'] = 'Nuevo mensaje desde la web de: %name%';

// These are the messages displayed in case of form errors.

$config['errors'] = array

(

	'no_name'       => 'El nombre está vacío',

	'no_email'      => 'El e-mail está vaciío',

	'invalid_email' => 'Dirección de e-mail no válida',

	'no_message'    => 'El mensaje está vacío',

);

// END OF CONFIGURATION -------------------------------------------------------

// Ignore non-POST requests

if ( ! $_POST)

	exit('Por favor, vuelve a la raíz del sitio web.');

// Was this an AJAX request or not?

$ajax = (isset($_SERVER['HTTP_X_REQUESTED_WITH']) AND strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest');

// Set the correct HTTP headers

header('Content-Type: text/'.($ajax ? 'plain' : 'html').'; charset=utf-8');

// Extract and trim contactform values

$name    = isset($_POST['name']) ? trim($_POST['name']) : '';

$email   = isset($_POST['email']) ? trim($_POST['email']) : '';

$empresa   = isset($_POST['empresa']) ? trim($_POST['empresa']) : '';

$telefono   = isset($_POST['telefono']) ? trim($_POST['telefono']) : '';

$message = isset($_POST['message']) ? trim($_POST['message']) : '';

// Take care of magic quotes if needed (you really should have them disabled)

if (get_magic_quotes_gpc())

{

	$name    = stripslashes($name);

	$email   = stripslashes($email);

	$empresa   = stripslashes($empresa);

	$telefono   = stripslashes($telefono);

	$message = stripslashes($message);

}

// Initialize the errors array which will also be sent back as a JSON object

$errors = NULL;

// Validate name

if ($name == '' || strpos($name, "\r") || strpos($name, "\n"))

{

	$errors['name'] = $config['errors']['no_name'];

}

// Validate email

if ($email == '')

{

	$errors['email'] = $config['errors']['no_email'];

}

elseif ( ! preg_match('/^[-_a-z0-9\'+*$^&%=~!?{}]++(?:\.[-_a-z0-9\'+*$^&%=~!?{}]+)*+@(?:(?![-.])[-a-z0-9.]+(?<![-.])\.[a-z]{2,6}|\d{1,3}(?:\.\d{1,3}){3})(?::\d++)?$/iD', $email))

{

	$errors['email'] = $config['errors']['invalid_email'];

}

// Validate message

if ($message == '')

{

	$errors['message'] = $config['errors']['no_message'];

}

// Validation succeeded

if (empty($errors))

{

	// Prepare subject line

	$subject = str_replace('%name%', $name, $config['subject']);

	// Additional mail headers

	$headers  = 'Content-Type: text/plain; charset=utf-8'."\r\n";

	$headers .= 'From: '.$email;

	// Send the mail

	if ( ! mail($config['recipient'], $subject, $message, $headers))

	{

		$errors['server'] = 'Parece que existen problemas técnicos con nuestro servidor. Por favor, vuelve a probar pasados unos minutos. '.

		                    'Si lo prefieres, puedes enviarnos un mail a '.$config['recipient'].'.Muchas gracias.';

	}

}

if ($ajax)

{

	// Output the possible errors as a JSON object

	echo json_encode($errors);

}

else

{

	// Show a simple HTML feedback message in case of non-javascript support

	if (empty($errors))

	{

		echo '<h4>Muchas gracias!</h4>';

		echo '<p>Tu mensaje ha sido enviado con &eacute;xito. Nos pondremos en contacto tan pronto nos sea posible.</p>';

	}

	else

	{

		echo '<h4>Oops!</h4>';

		echo '<p>Por favor, vuelve atr&aacute;s y comprueba los siguientes errores:</p>';

		echo '<ul><li>';

		echo implode('</li><li>', $errors);

		echo '</li></ul>';

	}

}

?>

$message="Telefono:".$telefono."<br>Empresa:".$empresa."<br>".$message;

// Send the mail

if ( ! mail($config['recipient'], $subject, $message, $headers))

.....

<?php

	///////////////////////////////////

	///////////////////////////////////

	//// THIS WILL HANDLE THE SHORTCODES

	//// FOR PORTFOLIO

	///////////////////////////////////

	///////////////////////////////////

	//Our hook

	add_shortcode('contact_form', 'ddshort_contact_form');

	//Our Funciton

	function ddshort_contact_form($atts, $content = null) {

		//extracts our attrs . if not set set default

		extract(shortcode_atts(array(

			'email' => get_option('admin_email')

		), $atts));

		$output = '

		<form id="contactform" action="'.get_bloginfo('template_url').'/includes/mail/post.php" method="post" enctype="multipart/form-data">

			<fieldset>

				<div class="input-div">

					<label for="name">Nombre <span class="naranja_fuerte_negrita">*</span>

						<input type="text" id="name" name="name" maxlength="75" value="" tabindex="1" />

	     			</label>

	     			<label for="email">Email <span class="naranja_fuerte_negrita">*</span>

	       				<input type="text" id="email" name="email" maxlength="75" value="" tabindex="2" />

	     			</label>

					<label for="empresa">Empresa

						<input type="text" id="empresa" name="empresa" maxlength="75" value="" tabindex="3" />

	     			</label>

					<label for="telefono">Tel&eacute;fono

						<input type="text" id="telefono" name="telefono" maxlength="9" value="" tabindex="4" />

	     			</label>

				</div>

			  	<div class="message-div">

					<label for="message">Mensaje <span class="naranja_fuerte_negrita">*</span>

						<textarea id="message" name="message" cols="20" rows="5" tabindex="5"></textarea>

					</label>

					<input type="submit" class="submit" value="enviar" />

					<input type="hidden" name="c_email" id="c_email" value="'.$email.'" />

			  	</div>

			</fieldset>          

		</form>';

		return $output;

	}

	include('tinyMCE.php');

?>

$empresa = isset($_POST['empresa']) ? trim($_POST['empresa']) : 'Empresa no llega';

$telefono = isset($_POST['telefono']) ? trim($_POST['telefono']) : 'Telefono no llega';