contact.php

<!-- include your own success html here -->
<?php
	if(isset($_POST['email'])) {
		// Lienas requeridas
		$email_to = "[email protected]";
		$email_subject = "Formulario de Contacto";
		$urlMaster = "http://yourdomain.com/";

		function died($error) {
 
				// Mostrar error
				echo "We are very sorry, but there were error(s) found with the form you submitted. ";
				echo "These errors appear below.<br /><br />";
				echo $error."<br /><br />";
				echo "Please go back and fix these errors.<br /><br />";
				die();
 
		}
 
		// Validaciones
 
		if(!isset($_POST['first_name']) || !isset($_POST['email']) || !isset($_POST['comments'])) {
 			died('We are sorry, but there appears to be a problem with the form you submitted.');
		}

		$first_name = $_POST['first_name']; // required
 
		$email_from = $_POST['email']; // required
 
		$comments = $_POST['comments']; // required
 
		$error_message = "";
 
		$email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';
 
		if(!preg_match($email_exp,$email_from)) {
			$error_message .= 'The Email Address you entered does not appear to be valid.<br />';
		}
	 
			$string_exp = "/^[A-Za-z .'-]+$/";
	 
		if(!preg_match($string_exp,$first_name)) {
			$error_message .= 'The First Name you entered does not appear to be valid.<br />';
		}
	 
		if(strlen($error_message) > 0) {
			died($error_message);
		}
 
		$email_message = "Detalles.\n\n";
 
		function clean_string($string) {
			$bad = array("content-type","bcc:","to:","cc:","href");
			return str_replace($bad,"",$string);
		}

		$email_message .= "Nombre: ".clean_string($first_name)."\n";
		$email_message .= "Email: ".clean_string($email_from)."\n";
		$email_message .= "Comments: ".clean_string($comments)."\n";

		// Crear email
		$headers = 'From: '.$email_from."\r\n".
					'Reply-To: '.$email_from."\r\n" .
					'X-Mailer: PHP/' . phpversion();

		@mail($email_to, $email_subject, $email_message, $headers);  
}

header("Location: ".$urlMaster);
 
?>

<p>Mensaje enviado con éxito a <?php echo $email_to; ?></p>