Código PHP:
<?php
$your_email ='micorreo';// <<=== update to your email address
session_start();
$errors = '';
$name = '';
$visitor_email = '';
$user_message = '';
$para = $_POST['para'];
if(isset($_POST['submit']))
{
$name = $_POST['name'];
$visitor_email = $_POST['email'];
$user_message = $_POST['message'];
$para = $_POST['para'];
///------------Do Validations-------------
if(empty($name)||empty($visitor_email))
{
$errors .= "\n Name and Email are required fields. ";
}
if(IsInjected($visitor_email))
{
$errors .= "\n Bad email value!";
}
if(empty($_SESSION['6_letters_code'] ) ||
strcasecmp($_SESSION['6_letters_code'], $_POST['6_letters_code']) != 0)
{
//Note: the captcha code is compared case insensitively.
//if you want case sensitive match, update the check above to
// strcmp()
$errors .= "\n The captcha code does not match!";
}
if(empty($errors))
{
//send the email
$to = $your_email;
$subject="New form submission";
$from = $your_email;
$ip = isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : '';
$body = "A user $name submitted the contact form:\n".
"Name: $name\n".
"Email: $visitor_email \n".
"Message: \n ".
"$user_message\n".
"IP: $ip\n";
"Para: $para;\n";
$headers = "From: $from \r\n";
$headers .= "Reply-To: $visitor_email \r\n";
mail($to, $subject, $body,$headers);
header('Location: thank-you.html');
}
}
// Function to validate against any email injection attempts
function IsInjected($str)
{
$injections = array('(\n+)',
'(\r+)',
'(\t+)',
'(%0A+)',
'(%0D+)',
'(%08+)',
'(%09+)'
);
$inject = join('|', $injections);
$inject = "/$inject/i";
if(preg_match($inject,$str))
{
return true;
}
else
{
return false;
}
}
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Contact Us</title>
<!-- define some style elements-->
<style>
label,a, body
{
font-family : Arial, Helvetica, sans-serif;
font-size : 12px;
}
.err
{
font-family : Verdana, Helvetica, sans-serif;
font-size : 12px;
color: red;
}
</style>
<!-- a helper script for vaidating the form-->
<script language="JavaScript" src="scripts/gen_validatorv31.js" type="text/javascript"></script>
</head>
<body>
<?php
if(!empty($errors)){
echo "<p class='err'>".nl2br($errors)."</p>";
}
?>
<div id='contact_form_errorloc' class='err'></div>
<form method="POST" name="contact_form"
action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>">
<p>
<label for='para'>Para: </label><br>
<select name="para">
<option value="webmaster">webmaster</option>
<option value="general">general</option>
<option value="museo">museo</option>
</select>
</p>
<p>
<label for='name'>Name: </label><br>
<input type="text" name="name" value='<?php echo htmlentities($name) ?>'>
</p>
<p>
<label for='email'>Email: </label><br>
<input type="text" name="email" value='<?php echo htmlentities($visitor_email) ?>'>
</p>
<p>
<label for='message'>Message:</label> <br>
<textarea name="message" rows=8 cols=30><?php echo htmlentities($user_message) ?></textarea>
</p>
<p>
<img src="captcha_code_file.php?rand=<?php echo rand(); ?>" id='captchaimg' ><br>
<label for='message'>Enter the code above here :</label><br>
<input id="6_letters_code" name="6_letters_code" type="text"><br>
<small>Can't read the image? click <a href='javascript: refreshCaptcha();'>here</a> to refresh</small>
</p>
<input type="submit" value="Submit" name='submit'>
</form>
<script language="JavaScript">
// Code for validating the form
// Visit http://www.javascript-coder.com/html-form/javascript-form-validation.phtml
// for details
var frmvalidator = new Validator("contact_form");
//remove the following two lines if you like error message box popups
frmvalidator.EnableOnPageErrorDisplaySingleBox();
frmvalidator.EnableMsgsTogether();
frmvalidator.addValidation("name","req","Please provide your name");
frmvalidator.addValidation("email","req","Please provide your email");
frmvalidator.addValidation("email","email","Please enter a valid email address");
</script>
<script language='JavaScript' type='text/javascript'>
function refreshCaptcha()
{
var img = document.images['captchaimg'];
img.src = img.src.substring(0,img.src.lastIndexOf("?"))+"?rand="+Math.random()*1000;
}
</script>
<noscript>
Code from the <a href='http://www.html-form-guide.com/contact-form/html-contact-form-captcha.html'
>php contact form</a> article.
</noscript>
</body>
</html> 
