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example_form.php
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example_form.php
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<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);
require_once __DIR__ . '/securimage.php';
// if not using Composer, must require these before using session
require_once __DIR__ . '/CaptchaObject.php';
require_once __DIR__ . '/StorageAdapter/AdapterInterface.php';
session_start(); // this MUST be called prior to any output including whitespaces and line breaks!
$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
$GLOBALS['ct_recipient'] = '[email protected]'; // Change to your email address! Make sure DEBUG_MODE above is 0 for mail to send!
$GLOBALS['ct_msg_subject'] = 'Securimage Test Contact Form';
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="Content-type" content="text/html;charset=UTF-8">
<title>Securimage Example Form</title>
<link rel="stylesheet" href="securimage.css" media="screen">
<style type="text/css">
<!--
div.error { display: block; color: #f00; font-weight: bold; font-size: 1.2em; }
span.error { display: block; color: #f00; font-style: italic; }
.success { color: #00f; font-weight: bold; font-size: 1.2em; }
form label { display: block; font-weight: bold; }
fieldset { width: 90%; }
legend { font-size: 24px; }
.note { font-size: 18px;
-->
</style>
</head>
<body>
<fieldset>
<legend>Example Form</legend>
<p class="note">
This is an example PHP form that processes user information, checks for errors, and validates the captcha code.<br />
This example form also demonstrates how to submit a form to itself to display error messages.
</p>
<?php
process_si_contact_form(); // Process the form, if it was submitted
if (isset($_SESSION['ctform']['error']) && $_SESSION['ctform']['error'] == true): /* The last form submission had 1 or more errors */ ?>
<div class="error">There was a problem with your submission. Errors are displayed below in red.</div><br>
<?php elseif (isset($_SESSION['ctform']['success']) && $_SESSION['ctform']['success'] == true): /* form was processed successfully */ ?>
<div class="success">The captcha was correct and the message has been sent! The captcha was solved in <?php echo $_SESSION['ctform']['timetosolve'] ?> seconds.</div><br />
<?php endif; ?>
<form method="post" action="<?= htmlspecialchars($_SERVER['REQUEST_URI'] . ($_SERVER['QUERY_STRING'] ?? '')) ?>" id="contact_form">
<input type="hidden" name="do" value="contact">
<p>
<label for="ct_name">Name*:</label>
<?php echo @$_SESSION['ctform']['name_error'] ?>
<input type="text" id="ct_name" name="ct_name" size="35" value="<?= htmlspecialchars($_SESSION['ctform']['ct_name'] ?? '') ?>">
</p>
<p>
<label for="ct_email">Email*:</label>
<?php echo @$_SESSION['ctform']['email_error'] ?>
<input type="text" id="ct_email" name="ct_email" size="35" value="<?= htmlspecialchars($_SESSION['ctform']['ct_email'] ?? '') ?>">
</p>
<p>
<label for="ct_URL">URL:</label>
<?php echo @$_SESSION['ctform']['URL_error'] ?>
<input type="text" id="ct_URL" name="ct_URL" size="35" value="<?= htmlspecialchars($_SESSION['ctform']['ct_URL'] ?? '') ?>">
</p>
<p>
<label for="ct_message">Message*:</label>
<?= $_SESSION['ctform']['message_error'] ?? '' ?>
<textarea id="ct_message" name="ct_message" rows="12" cols="60"><?= htmlspecialchars($_SESSION['ctform']['ct_message'] ?? '') ?></textarea>
</p>
<div>
<?php
// show captcha HTML using Securimage::getCaptchaHtml()
$options = array();
$options['input_name'] = 'ct_captcha'; // change name of input element for form post
if (!empty($_SESSION['ctform']['captcha_error'])) {
// error html to show in captcha output
$options['error_html'] = $_SESSION['ctform']['captcha_error'];
}
echo "<div id='captcha_container_1'>\n";
echo Securimage::getCaptchaHtml($options);
echo "\n</div>\n";
/*
// To render some or all captcha components individually
$options['input_name'] = 'ct_captcha_2';
$options['image_id'] = 'ct_captcha_2';
$options['input_id'] = 'ct_captcha_2';
$options['namespace'] = 'captcha2';
echo "<br>\n<div id='captcha_container_2'>\n";
echo Securimage::getCaptchaHtml($options, Securimage::HTML_IMG);
echo Securimage::getCaptchaHtml($options, Securimage::HTML_ICON_REFRESH);
echo Securimage::getCaptchaHtml($options, Securimage::HTML_AUDIO);
echo '<div style="clear: both"></div>';
echo Securimage::getCaptchaHtml($options, Securimage::HTML_INPUT_LABEL);
echo Securimage::getCaptchaHtml($options, Securimage::HTML_INPUT);
echo "\n</div>";
*/
?>
</div>
<p>
<br>
<input type="submit" value="Submit Message">
</p>
</form>
</fieldset>
</body>
</html>
<?php
// The form processor PHP code
function process_si_contact_form()
{
$_SESSION['ctform'] = array(); // re-initialize the form session data
if ($_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
$capId = @$_POST['captcha_id']; // the captcha ID to check
$name = substr($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
$errors['email_error'] = 'Email address is required';
} else if ( !preg_match('/^(?:[\w\d-]+\.?)+@(?:(?:[\w\d]\-?)+\.)+\w{2,63}$/i', $email)) {
// invalid email format
$errors['email_error'] = 'Email address entered is invalid';
}
if (strlen($message) < 20) {
// message length too short
$errors['message_error'] = 'Your message must be longer than 20 characters';
}
}
// Only try to validate the captcha if the form has no errors
// This is especially important for ajax calls
if (sizeof($errors) == 0) {
$securimage = new Securimage();
/**
* Validate the user input ($captcha) against the submitted captcha ID ($capId).
* The third parameter (true) tells Securimage to delete the data for this
* captcha ID even if the guess was incorrect. Since the form POSTs to itself
* and reloads the page, the old ID is never used again and no longer needed.
*
* $securimage->check() returns TRUE if the code is correct, or FALSE if it was
* incorrect. Only let the form pass if check() returns TRUE.
*
*/
if ($securimage->check($captcha, $capId, true) == false) {
$errors['captcha_error'] = 'Incorrect security code entered<br />';
}
}
if (sizeof($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 />"
. "<em>Name: $name</em><br />"
. "<em>Email: $email</em><br />"
. "<em>URL: $URL</em><br />"
. "<em>Message:</em><br />"
. "<pre>$message</pre>"
. "<br /><br /><em>IP Address:</em> {$_SERVER['REMOTE_ADDR']}<br />"
. "<em>Time:</em> $time<br />"
. "<em>Browser:</em> " . htmlspecialchars($_SERVER['HTTP_USER_AGENT']) . "<br />";
$message = wordwrap($message, 70);
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=UTF-8\r\nMIME-Version: 1.0");
}
$_SESSION['ctform']['timetosolve'] = $securimage->getTimeToSolve();
$_SESSION['ctform']['error'] = false; // no error with form
$_SESSION['ctform']['success'] = true; // message sent
} else {
// save the entries, this is to re-populate the form
$_SESSION['ctform']['ct_name'] = $name; // save name from the form submission
$_SESSION['ctform']['ct_email'] = $email; // save email
$_SESSION['ctform']['ct_URL'] = $URL; // save URL
$_SESSION['ctform']['ct_message'] = $message; // save message
foreach($errors as $key => $error) {
// set up error messages to display with each field
$_SESSION['ctform'][$key] = "<span class=\"error\">$error</span>";
}
$_SESSION['ctform']['error'] = true; // set error floag
}
} // POST
}
$_SESSION['ctform']['success'] = false; // clear success value after running