form_process.php

<?php 
/* 	
If you see this text in your browser, PHP is not configured correctly on this hosting provider. 
Contact your hosting provider regarding PHP configuration for your site.

PHP file generated by Adobe Muse CC 2014.1.375
*/

require_once('form_throttle.php');

function process_form($form) {
	if ($_SERVER['REQUEST_METHOD'] != 'POST')
		die(get_form_error_response('Método de solicitação de servidor desconhecido'));

	if (formthrottle_too_many_submissions($_SERVER['REMOTE_ADDR']))
		die(get_form_error_response('Muitos envios recentes deste IP'));
	
	// will die() if there are any errors
	check_required_fields($form);
	
	// will die() if there is a send email problem
	email_form_submission($form);
}

function get_form_error_response($error) {
	return get_form_response(false, array('error' => $error));
}

function get_form_response($success, $data) {
	if (!is_array($data))
		die('data must be array');
		
	$status = array();
	$status[$success ? 'FormResponse' : 'MusePHPFormResponse'] = array_merge(array('success' => $success), $data);
	
	return json_serialize($status);
}

function check_required_fields($form) {
	$errors = array();

	foreach ($form['fields'] as $field => $properties) {
		if (!$properties['required'])
			continue;

		if (!array_key_exists($field, $_REQUEST) || empty($_REQUEST[$field]))
			array_push($errors, array('field' => $field, 'message' => $properties['errors']['required']));
		else if (!check_field_value_format($form, $field, $properties))
			array_push($errors, array('field' => $field, 'message' => $properties['errors']['format']));
	}

	if (!empty($errors))
		die(get_form_error_response(array('fields' => $errors)));
}

function check_field_value_format($form, $field, $properties) {
	$value = get_form_field_value($field, $properties);

	switch($properties['type']) {
		case 'checkbox':
		case 'string':
		case 'captcha':
			// no format to validate for those fields
			return true;

		case 'recaptcha':
			if (!array_key_exists('recaptcha', $form) || !array_key_exists('private_key', $form['recaptcha']) || empty($form['recaptcha']['private_key']))
				die(get_form_error_response('Chave privada do reCAPTCHA inválida.'));
			$resp = recaptcha_check_answer($form['recaptcha']['private_key'], $_SERVER["REMOTE_ADDR"], $_POST["recaptcha_challenge_field"], $_POST["recaptcha_response_field"]);
			return $resp->is_valid;

		case 'email':
			return 1 == preg_match('/^[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$/i', $value);

		default:
			die(get_form_error_response(sprintf('Tipo de campo desconhecido \"%s\".', $properties['type'])));
	}
}

function email_form_submission($form) {
	if(!defined('PHP_EOL'))
		define('PHP_EOL', '\r\n');

	$form_email = ((array_key_exists('Email', $_REQUEST) && !empty($_REQUEST['Email'])) ? cleanup_email($_REQUEST['Email']) : '');

	$to = $form['email']['to'];
	$from = $form['email']['from'];
	$subject = $form['subject'];
	$message = get_email_body($subject, $form['heading'], $form['fields']);
	$headers = get_email_headers($to, $form_email);	

	$sent = @mail($from, $subject, $message, $headers, '-f' . $from);
	
	if(!$sent)
		die(get_form_error_response('Falha no envio do email'));
	
	$success_data = array(
		'redirect' => $form['success_redirect']
	);
	
	echo get_form_response(true, $success_data);
}

function get_email_headers($from_email, $form_email) {
	$headers = 'From: ' . $from_email . PHP_EOL;
	$headers .= 'Return-Path: ' . $from_email . PHP_EOL;
	$headers .= 'Reply-To: ' . $form_email . PHP_EOL;
	$headers .= 'X-Mailer: Adobe Muse CC 2014.1.375 with PHP' . PHP_EOL;
	$headers .= 'Content-type: text/html; charset=utf-8' . PHP_EOL;
	
	return $headers;
}

function get_email_body($subject, $heading, $fields) {
	$message = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">';
	$message .= '<html xmlns="http://www.w3.org/1999/xhtml">';
	$message .= '<head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/><title>' . encode_for_form($subject) . '</title></head>';
	$message .= '<body style="background-color: #ffffff; color: #000000; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: 18px; font-family: helvetica, arial, verdana, sans-serif;">';
	$message .= '<h2 style="background-color: #eeeeee;">' . $heading . '</h2>';
	$message .= '<table cellspacing="0" cellpadding="0" width="100%" style="background-color: #ffffff;">'; 

	foreach ($fields as $field => $properties) {
		// Skip reCAPTCHA from email submission
		if ('recaptcha' == $properties['type'])
			continue;

		$message .= '<tr><td valign="top" style="background-color: #ffffff;"><b>' . encode_for_form($properties['label']) . ':</b></td><td>' . get_form_field_value($field, $properties) . '</td></tr>';
	}

	$message .= '</table>';
	$message .= '<br/><br/>';
	$message .= '<div style="background-color: #eeeeee; font-size: 10px; line-height: 11px;">formulário enviado do site: ' . encode_for_form($_SERVER['SERVER_NAME']) . '</div>';
	$message .= '<div style="background-color: #eeeeee; font-size: 10px; line-height: 11px;">Endereço IP do visitante: ' . encode_for_form($_SERVER['REMOTE_ADDR']) . '</div>';
	$message .= '</body></html>';

	return cleanup_message($message);
}

function is_assoc_array($arr) {
	if (!is_array($arr))
		return false;
	
	$keys = array_keys($arr);
	foreach (array_keys($arr) as $key)
		if (is_string($key)) return true;

	return false;
}

function json_serialize($data) {

	if (is_assoc_array($data)) {
		$json = array();
	
		foreach ($data as $key => $value)
			array_push($json, '"' . $key . '": ' . json_serialize($value));
	
		return '{' . implode(', ', $json) . '}';
	}
	
	if (is_array($data)) {
		$json = array();
	
		foreach ($data as $value)
			array_push($json, json_serialize($value));
	
		return '[' . implode(', ', $json) . ']';
	}
	
	if (is_int($data) || is_float($data))
		return $data;
	
	if (is_bool($data))
		return $data ? 'true' : 'false';
	
	return '"' . encode_for_json($data) . '"';
}

function encode_for_json($value) {
	return preg_replace(array('/([\'"\\t\\\\])/i', '/\\r/i', '/\\n/i'), array('\\\\$1', '\\r', '\\n'), $value);
}

function encode_for_form($text) {
	return htmlentities($text, ENT_COMPAT, 'UTF-8');
}

function get_form_field_value($field, $properties) {
	$value = $_REQUEST[$field];
	
	switch($properties['type']) {
		case 'checkbox':
			return (($value == '1' || $value == 'true') ? 'Marcado' : 'Desmarcado');
		
		case 'string':
		case 'captcha':
		case 'recaptcha':
		case 'email':
			return encode_for_form($value);

		default:
			die(get_form_error_response(sprintf('Tipo de campo desconhecido \"%s\".', $properties['type'])));
	}
}

function cleanup_email($email) {
	$email = encode_for_form($email);
	$email = preg_replace('=((<CR>|<LF>|0x0A/%0A|0x0D/%0D|\\n|\\r)\S).*=i', null, $email);
	return $email;
}

function cleanup_message($message) {
	$message = wordwrap($message, 70, "\r\n");
	return $message;
}
?>