Código PHP:
<?php
// User settings
$to = "[email protected]";
$subject = "Proofreading Contact Form";
// Include extra form fields and/or submitter data?
// false = do not include
$extra = array(
"form_subject" => true,
"form_cc" => true,
"ip" => true,
"user_agent" => true
);
// Process
$action = isset($_POST["action"]) ? $_POST["action"] : "";
if (empty($action)) {
// Send back the contact form HTML
$output = "<div style='display:none'>
<div class='contact-top'></div>
<div class='contact-content'>
<h1 class='contact-title'>Send us a message:</h1>
<div class='contact-loading' style='display:none'></div>
<div class='contact-message' style='display:none'></div>
<form action='#' style='display:none'>
<label for='contact-name'>*Name:</label>
<input type='text' id='contact-name' class='contact-input' name='name' tabindex='1001' />
<label for='contact-email'>*Email:</label>
<input type='text' id='contact-email' class='contact-input' name='email' tabindex='1002' />";
if ($extra["form_subject"]) {
$output .= "
<label for='contact-subject'>Subject:</label>
<input type='text' id='contact-subject' class='contact-input' name='subject' value='' tabindex='1003' />";
}
$output .= "
<label for='contact-message'>*Message:</label>
<textarea id='contact-message' class='contact-input' name='message' cols='40' rows='4' tabindex='1004'></textarea>
<br/>";
if ($extra["form_cc"]) {
$output .= "
<label> </label>
<input type='checkbox' id='contact-cc' name='cc' value='1' tabindex='1005' /> <span class='contact-cc'>Send me a copy</span>
<br/>";
}
$output .= "
<label> </label>
<button type='submit' class='contact-send contact-button' tabindex='1006'>Send</button>
<button type='submit' class='contact-cancel contact-button simplemodal-close' tabindex='1007'>Cancel</button>
<br/>
<input type='hidden' name='token' value='" . smcf_token($to) . "'/>
</form>
</div>
</div>";
echo $output;
}
else if ($action == "send") {
// Send the email
$name = isset($_POST["name"]) ? $_POST["name"] : "";
$email = isset($_POST["email"]) ? $_POST["email"] : "";
$subject = isset($_POST["subject"]) ? $_POST["subject"] : $subject;
$message = isset($_POST["message"]) ? $_POST["message"] : "";
$cc = isset($_POST["cc"]) ? $_POST["cc"] : "";
$token = isset($_POST["token"]) ? $_POST["token"] : "";
// make sure the token matches
if ($token === smcf_token($to)) {
smcf_send($name, $email, $subject, $message, $cc);
echo "Your message was successfully sent.";
}
else {
echo "Unfortunately, your message could not be verified.";
}
}
function smcf_token($s) {
return md5("smcf-" . $s . date("WY"));
}
// Validate and send email
function smcf_send($name, $email, $subject, $message, $cc) {
global $to, $extra;
// Filter and validate fields
$name = smcf_filter($name);
$subject = smcf_filter($subject);
$email = smcf_filter($email);
if (!smcf_validate_email($email)) {
$subject .= " - invalid email";
$message .= "\n\nBad email: $email";
$email = $to;
$cc = 0; // do not CC "sender"
}
// Add additional info to the message
if ($extra["ip"]) {
$message .= "\n\nIP: " . $_SERVER["REMOTE_ADDR"];
}
if ($extra["user_agent"]) {
$message .= "\n\nUSER AGENT: " . $_SERVER["HTTP_USER_AGENT"];
}
// Set and wordwrap message body
$body = "From: $name\n\n";
$body .= "Message: $message";
$body = wordwrap($body, 70);
// Build header
$headers = "From: $email\n";
if ($cc == 1) {
$headers .= "Cc: $email\n";
}
$headers .= "X-Mailer: PHP/SimpleModalContactForm";
// UTF-8
if (function_exists('mb_encode_mimeheader')) {
$subject = mb_encode_mimeheader($subject, "UTF-8", "B", "\n");
}
else {
// you need to enable mb_encode_mimeheader or risk
// getting emails that are not UTF-8 encoded
}
$headers .= "MIME-Version: 1.0\n";
$headers .= "Content-type: text/plain; charset=utf-8\n";
$headers .= "Content-Transfer-Encoding: quoted-printable\n";
// Send email
@mail($to, $subject, $body, $headers) or
die("Unfortunately, a server issue prevented delivery of your message.");
}
// Remove any un-safe values to prevent email injection
function smcf_filter($value) {
$pattern = array("/\n/","/\r/","/content-type:/i","/to:/i", "/from:/i", "/cc:/i");
$value = preg_replace($pattern, "", $value);
return $value;
}
// Validate email address format in case client-side validation "fails"
function smcf_validate_email($email) {
$at = strrpos($email, "@");
// Make sure the at (@) sybmol exists and
// it is not the first or last character
if ($at && ($at < 1 || ($at + 1) == strlen($email)))
return false;
// Make sure there aren't multiple periods together
if (preg_match("/(\.{2,})/", $email))
return false;
// Break up the local and domain portions
$local = substr($email, 0, $at);
$domain = substr($email, $at + 1);
// Check lengths
$locLen = strlen($local);
$domLen = strlen($domain);
if ($locLen < 1 || $locLen > 64 || $domLen < 4 || $domLen > 255)
return false;
// Make sure local and domain don't start with or end with a period
if (preg_match("/(^\.|\.$)/", $local) || preg_match("/(^\.|\.$)/", $domain))
return false;
// Check for quoted-string addresses
// Since almost anything is allowed in a quoted-string address,
// we're just going to let them go through
if (!preg_match('/^"(.+)"$/', $local)) {
// It's a dot-string address...check for valid characters
if (!preg_match('/^[-a-zA-Z0-9!#$%*\/?|^{}`~&\'+=_\.]*$/', $local))
return false;
}
// Make sure domain contains only valid characters and at least one period
if (!preg_match("/^[-a-zA-Z0-9\.]*$/", $domain) || !strpos($domain, "."))
return false;
return true;
}
exit;
?> 
