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example_form.ajax.php
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example_form.ajax.php
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<?php
session_start(); // this MUST be called prior to any output including whitespaces and line breaks!
$GLOBALS['ct_recipient'] = 'YOU@EXAMPLE.COM'; // Change to your email address!
$GLOBALS['ct_msg_subject'] = 'Securimage Test Contact Form';
$GLOBALS['DEBUG_MODE'] = 1;
// CHANGE TO 0 TO TURN OFF DEBUG MODE
// IN DEBUG MODE, ONLY THE CAPTCHA CODE IS VALIDATED, AND NO EMAIL IS SENT
// Process the form, if it was submitted
process_si_contact_form();
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-type" content="text/html;charset=UTF-8" />
<title>Securimage Example Form</title>
<style type="text/css">
<!--
#success_message { border: 1px solid #000; width: 550px; text-align: left; padding: 10px 7px; background: #33ff33; color: #000; font-weight; bold; font-size: 1.2em; border-radius: 4px; -moz-border-radius: 4px; -webkit-border-radius: 4px; }
fieldset { width: 90%; }
legend { font-size: 24px; }
.note { font-size: 18px; }
-->
</style>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/prototype/1.7.0.0/prototype.js"></script>
<script type="text/javascript">
function reloadCaptcha()
{
document.getElementById('siimage').src = './securimage_show.php?sid=' + Math.random();
}
function processForm()
{
new Ajax.Request('<?php echo $_SERVER['PHP_SELF'] ?>', {
method: 'post',
parameters: $('contact_form').serialize(),
onSuccess: function(transport) {
try {
var r = transport.responseText.evalJSON();
if (r.error == 0) {
$('success_message').show();
$('contact_form').reset();
reloadCaptcha();
setTimeout("$('success_message').hide()", 30000);
} else {
alert("There was an error with your submission.\n\n" + r.message);
}
} catch(ex) {
alert("There was an error parsing the json");
}
},
onFailure: function(err) {
alert("Ajax request failed");
}
});
return false;
}
</script>
</head>
<body>
<fieldset>
<legend>Example Form</legend>
<p class="note">
This is an example PHP form that processes user information, checks for errors, and validates the captcha code.<br />
This example form also demonstrates how to submit a form to itself to display error messages.
</p>
<div id="success_message" style="display: none">Your message has been sent!<br />We will contact you as soon as possible.</div>
<form method="post" action="" id="contact_form" onsubmit="return processForm()">
<input type="hidden" name="do" value="contact" />
<p>
<strong>Name*:</strong><br />
<input type="text" name="ct_name" size="35" value="" />
</p>
<p>
<strong>Email*:</strong><br />
<input type="text" name="ct_email" size="35" value="" />
</p>
<p>
<strong>URL:</strong><br />
<input type="text" name="ct_URL" size="35" value="" />
</p>
<p>
<strong>Message*:</strong><br />
<textarea name="ct_message" rows="12" cols="60"></textarea>
</p>
<p>
<img id="siimage" style="border: 1px solid #000; margin-right: 15px" src="./securimage_show.php?sid=<?php echo md5(uniqid()) ?>" alt="CAPTCHA Image" align="left" />
<object type="application/x-shockwave-flash" data="./securimage_play.swf?bgcol=#ffffff&icon_file=./images/audio_icon.png&audio_file=./securimage_play.php" height="32" width="32">
<param name="movie" value="./securimage_play.swf?bgcol=#ffffff&icon_file=./images/audio_icon.png&audio_file=./securimage_play.php" />
</object>
<a tabindex="-1" style="border-style: none;" href="#" title="Refresh Image" onclick="document.getElementById('siimage').src = './securimage_show.php?sid=' + Math.random(); this.blur(); return false"><img src="./images/refresh.png" alt="Reload Image" height="32" width="32" onclick="this.blur()" align="bottom" border="0" /></a><br />
<strong>Enter Code*:</strong><br />
<input type="text" name="ct_captcha" size="12" maxlength="8" />
</p>
<p>
<br />
<input type="submit" value="Submit Message" />
</p>
</form>
</fieldset>
</body>
</html>
<?php
// The form processor PHP code
function process_si_contact_form()
{
if ($_SERVER['REQUEST_METHOD'] == 'POST' && @$_POST['do'] == 'contact') {
// if the form has been submitted
foreach($_POST as $key => $value) {
if (!is_array($key)) {
// sanitize the input data
if ($key != 'ct_message') $value = strip_tags($value);
$_POST[$key] = htmlspecialchars(stripslashes(trim($value)));
}
}
$name = @$_POST['ct_name']; // name from the form
$email = @$_POST['ct_email']; // email from the form
$URL = @$_POST['ct_URL']; // url from the form
$message = @$_POST['ct_message']; // the message from the form
$captcha = @$_POST['ct_captcha']; // the user's entry for the captcha code
$name = substr($name, 0, 64); // limit name to 64 characters
$errors = array(); // initialize empty error array
if (isset($GLOBALS['DEBUG_MODE']) && $GLOBALS['DEBUG_MODE'] == false) {
// only check for errors if the form is not in debug mode
if (strlen($name) < 3) {
// name too short, add error
$errors['name_error'] = 'Your name is required';
}
if (strlen($email) == 0) {
// no email address given
$errors['email_error'] = 'Email address is required';
} else if ( !preg_match('/^(?:[\w\d]+\.?)+@(?:(?:[\w\d]\-?)+\.)+\w{2,4}$/i', $email)) {
// invalid email format
$errors['email_error'] = 'Email address entered is invalid';
}
if (strlen($message) < 20) {
// message length too short
$errors['message_error'] = 'Please enter a message';
}
}
// Only try to validate the captcha if the form has no errors
// This is especially important for ajax calls
if (sizeof($errors) == 0) {
require_once dirname(__FILE__) . '/securimage.php';
$securimage = new Securimage();
if ($securimage->check($captcha) == false) {
$errors['captcha_error'] = 'Incorrect security code entered';
}
}
if (sizeof($errors) == 0) {
// no errors, send the form
$time = date('r');
$message = "A message was submitted from the contact form. The following information was provided.<br /><br />"
. "Name: $name<br />"
. "Email: $email<br />"
. "URL: $URL<br />"
. "Message:<br />"
. "<pre>$message</pre>"
. "<br /><br />IP Address: {$_SERVER['REMOTE_ADDR']}<br />"
. "Time: $time<br />"
. "Browser: {$_SERVER['HTTP_USER_AGENT']}<br />";
if (isset($GLOBALS['DEBUG_MODE']) && $GLOBALS['DEBUG_MODE'] == false) {
// send the message with mail()
mail($GLOBALS['ct_recipient'], $GLOBALS['ct_msg_subject'], $message, "From: {$GLOBALS['ct_recipient']}\r\nReply-To: {$email}\r\nContent-type: text/html; charset=ISO-8859-1\r\nMIME-Version: 1.0");
}
$return = array('error' => 0, 'message' => 'OK');
die(json_encode($return));
} else {
$errmsg = '';
foreach($errors as $key => $error) {
// set up error messages to display with each field
$errmsg .= " - {$error}\n";
}
$return = array('error' => 1, 'message' => $errmsg);
die(json_encode($return));
}
} // POST
} // function process_si_contact_form()