PHP - Google Recaptcha V2 Problem

I am still fairly new to using phpmailer and it works but I have been asked to google recaptcha v2 checkbox into their contact form but unsure how to do that within the phpmailer code, below is what I currently have

 

<?php

// PHPMailer classes into the global namespace
use PHPMailer\PHPMailer\PHPMailer; 
use PHPMailer\PHPMailer\Exception;
// Base files 
require 'PHPMailer/src/Exception.php';
require 'PHPMailer/src/PHPMailer.php';
require 'PHPMailer/src/SMTP.php';

// create object of PHPMailer class with boolean parameter which sets/unsets exception.
$mail = new PHPMailer(true);
try {
    //$mail->isSMTP(); // using SMTP protocol
    $mail->Host = 'hostname'; // SMTP host as gmail 
    $mail->SMTPAuth = true;  // enable smtp authentication
    $mail->Username = 'emailaddress';  // sender gmail host              
    $mail->Password = 'emailpassword'; // sender gmail host password                          
    $mail->SMTPSecure = 'ssl';  // for encrypted connection                           
    $mail->Port = 587;   // port for SMTP     

    $mail->setFrom('emailaddress', "Business Name"); // sender's email and name
    $mail->addAddress('emailaddress', "Business Name");  // receiver's email and name

    $mail->Subject = 'New Website Enquiry';
    $mail->Body    = "A new website enquiry has been made. The enquiry information is below" . "\r\n\r\n" . "Name: " . $_POST["name"] . "\r\n" . "Email: " . $_POST["email"] . "\r\n" . "Subject: " . $_POST["subjectline"] . "\r\n" . "Message: " . $_POST["message"];
    
    $mail->send();
    header('Location:enquiry-confirmation.php');
    } catch (Exception $e) { // handle error.
    echo 'Message could not be sent. Mailer Error: ', $mail->ErrorInfo;
    }
?>

Can anyone help please as to where the code needs to go to check if the checkbox has been checked or not

Hello

 How can i add google recaptcha to this code https://github.com/Tutorialwork/Tutorials/blob/master/PHP Rechtesystem/addnews.php

Why am I getting that error on Google reCAPTCHA V2 response?

Hello, it's my first time posting here and I'm not good with such stuff as the one I'm posting right now

I have been trying to solve this issue for 2 days by now so I could use some help lol

This error "Please solve the captcha." is showing even if the captcha is verified so it's showing in the both cases (verified/unverified).

Thanks in advance.

>> PHP Part:

<?php

require_once 'db/setting.php';
require_once 'db/odbc.php';

session_start();
error_reporting(0);

if (isset($_SERVER['HTTPS']) &&
    ($_SERVER['HTTPS'] == 'on' || $_SERVER['HTTPS'] == 1) ||
    isset($_SERVER['HTTP_X_FORWARDED_PROTO']) &&
    $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') {
  $protocol = 'https://';
}
else {
  $protocol = 'http://';
}
$currentDomain = $protocol.$_SERVER[HTTP_HOST];

$API["secret_key"] = "xx";
$API["api_key"] = "xx";
$API["callback"] = $currentDomain."/vote-reward-tok.php?return={RETURNEDCODE}";
$API["API_Domain"] = "http://api.top-kal.com";

$secretKey = 'xxx';
$captcha = $_POST['g-recaptcha-response'];
$ip = $_SERVER['REMOTE_ADDR'];
$responseData=file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=".$secretKey."&responseData=".$captcha."&remoteip=".$ip);
$responseKeys = json_decode($responseData,true);

$config["db_username"] = "sa";
$config["db_password"] = "********";
$config["db_database_account"] = "kal_auth";
$config["db_database_player"] = "kal_db";
$config["db_server"] = "NAME\SQLEXPRESS";
$config["db_driver"] = "SQL Server";

$config["Reward_Name"] = "Vote Coin";
$config["MinLvl_Require"] = 30;
$config["Reward_Index"] = 447;
$config["Reward_Amount"] = 10;
$config["Reward_Bound"] = false;

>> SQL Part

function insertRewards($account_unique_id){
    global $config;

    $connect = odbc_connect('Driver={'.$config["db_driver"].'};Server='.$config["db_server"].';Database='.$config["db_database_player"].';', $config['db_username'] ,$config['db_password']);
    
    if(!$connect)
        return false;

    $query = odbc_exec($connect,"SELECT Top 1 [IID] FROM [Item] Where [IID] < 1 order by IID Desc");
    if(!$query)
        return false;

    $data = odbc_fetch_array($query);
    if($data && !empty($data) && isset($data["IID"]))
        odbc_exec($connect,"INSERT INTO [Item] ([PID],[IID],[Index],[Prefix],[Info],[Num])VALUES ($account_unique_id,".($data["IID"]+1).",".$config["Reward_Index"].",0,".(16+($config["Reward_Bound"] ? 128 : 0)).",".$config["Reward_Amount"].")");
    
}

function checkCharacters($accountUID){
    global $config;

    $connect = odbc_connect('Driver={'.$config["db_driver"].'};Server='.$config["db_server"].';Database='.$config["db_database_player"].';', $config['db_username'] ,$config['db_password']);
    
    if(!$connect)
        return array("error" => "failed to connect to database players.");

    $query = odbc_exec($connect,"SELECT [Level] FROM [Player] WHERE [UID] = $accountUID ORDER BY [Level] DESC");
    if(!$query)
        return array("error" => "failed to find characters in this account id.");

    while($r = odbc_fetch_array($query)){
        if($r["Level"]  >= $config["MinLvl_Require"])
        return array("success" => $accountUID);
    }
  return array("error" => "You should have one character at least higher than level : ".$config["MinLvl_Require"]." to vote.");
}

function checkAccount($accountID){
    global $config;

    $connect = odbc_connect('Driver={'.$config["db_driver"].'};Server='.$config["db_server"].';Database='.$config["db_database_account"].';', $config['db_username'] ,$config['db_password']);
    
    if(!$connect)
        return array("error" => "failed to connect to database accounts.");

    $query = odbc_exec($connect,"SELECT TOP 1 [UID] FROM [Login] WHERE [ID] = '$accountID'");
    if(!$query)
        return array("error" => "this account id not exists.");

    $data = odbc_fetch_array($query);
    if(!$data || empty($data) || !isset($data["UID"]))
        return array("error" => "this account id not exists.");

    if($config["MinLvl_Require"] > 0)
          return checkCharacters($data["UID"]);
      
  return array("success" => $data["UID"]);
}

>> Submitting Function

$response = array("error" => false , "success" => false , 'redirect' => false);

function post_content($query){
$query_array = array();foreach( $query as $key => $key_value )$query_array[] = urlencode( $key ) . '=' . urlencode( $key_value );return implode( '&', $query_array );
}

    global $API;
    $opts = array('http' =>  array('method'  => 'POST',"header" => "Content-type: application/x-www-form-urlencoded\r\nAuthorization:".base64_encode($API["api_key"].":".$API["secret_key"])."\r\n", "content" => post_content($content)));return stream_context_create($opts);
}

function submit(){
    global $API;

    if(empty($captcha) || $captcha == '' || !isset($captcha))
        return array(    "error" => "Please solve the captcha.");
    
    if (empty($_POST['account']) || !ctype_alnum($_POST['account']))
        return array(    "error" => "Invalid account id.");
        
    $checkAccount = checkAccount($_POST['account']);

    if (isset($checkAccount["error"]))
        return array("error" => $checkAccount["error"]);

    if (isset($checkAccount["success"])){
        $account_unique_id = (isset($_SESSION['kal_id'])) ? $_SESSION['kal_id'] : $checkAccount["success"]; 
        $result = json_decode(file_get_contents($API["API_Domain"] . '/api/generate/vote-rewards-token', false, postParams(array('callback' => $API["callback"],'account_unique_id' => $account_unique_id    ))) , true);
            {
        echo '<br><center><h3>Please wait...</h3></center>';
    }
        if (!empty($result)){
            if (isset($result["response"])){
                if (isset($result["response"]["error"]))
                    return array("error" => $result["response"]["error"]);
                elseif (isset($result["response"]["success"]))
                    return array("redirect" => '<script type="text/javascript">setTimeout(function () { window.location.href = "'.$result["response"]["success"].'";}, 500)</script>');
            }
        }
    }
}
if ($_SERVER['REQUEST_METHOD'] == 'POST' && isset($_POST['account'])){
    $response = submit();
    if (isset($response['redirect']) && $response['redirect']){
        echo $response['redirect'];
        die;
        }
}elseif (isset($_GET['return'])){
    $result = json_decode(file_get_contents($API["API_Domain"] . '/api/verify/vote-rewards-token', false, postParams(array('returned_code' => $_GET['return']))) , true);
    if (!empty($result)){
        if (isset($result["response"])){
            if (isset($result["response"]["error"]))
                $response['error'] = $result["response"]["error"];
            elseif (isset($result["response"]["success"])){
                insertRewards($result["response"]["account_unique_id"]);
                $response['success'] = '<b>Thank you, Your vote has been recorded and the server rank will be updated soon.<b><br />You will receive your rewards in storage of your account.<p>Your next vote in : <b>' . $result["response"]["NextVote"] . '</b></p>';
                }
            }
        }
    }
?>

>> HTML part:

<head>
<title>Vote Rewards - <?php echo $config['serverName']; ?></title>
<link rel="shortcut icon" href=images/favicon.png"> 
<link rel="stylesheet" href="css/vote.css">
<link rel="stylesheet" href="css/fontawesome.css">
<link rel="stylesheet" href="css/fontawesomeall.css">
<script src='https://www.google.com/recaptcha/api.js'></script>

</head>
<body>
<form class="vote-form" method="post">
<noscript><div class="isa_error">Javascript is not enabled in your browser! Please enable it or change your browser.</div></noscript>
<?php if(isset($response['error']) && $response['error']){ ?><div class="isa_error"> <?php echo $response['error'] ;?> </div> <?php } ?>
<?php if(isset($response['success']) && $response['success']){ ?><div class="isa_success"> <?php echo $response['success'] ;?> </div>
<?php }else{ ?>
    <label>
        <span>Account ID :</span>
        <input  type="text" name="account" maxlength="20" <?php echo (isset($_SESSION['kal_username'])) ? 'readonly value="'.$_SESSION['kal_username'].'"' : ""; ?>" />
    </label>
    <div class="g-recaptcha" style="margin:0 auto;" data-sitekey="xxx" data-theme="dark"></div>
     <label class="label_btn">
        <input type="submit" class="button" value="Vote" /> 
    </label> 
<?php } ?>    
</form>
<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
</body>
</html>

I am a php newbie and with help from someone on this forum managed to get my php form working. I am now trying to add recaptcha 3 but can't get it to work. I have added my code to this post and would appreciate some pointers. 

<?php
/* This is the Header PHP file */
?>
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta name="description" content="">
    <meta name="author" content="My Name">

    
    <title>My Title</title>

    <!--Bootstrap Core CSS-->
    <link href="assets/css/bootstrap.min.css" rel="stylesheet">

    <!--Font Awresome Icons-->
    <link href="https://fonts.googleapis.com/css?family=Open+Sans:400,600&display=swap" rel="stylesheet">

    <!--Google Fonts-->
    <link href="assets/css/fontawesome/css/all.min.css" rel="stylesheet">

    <!--Adobe Typekit Fonts-->
    <link href="https://use.typekit.net/jtf1geg.css" rel="stylesheet">

    <!--Custom CSS-->
    <link href="assets/css/custom.css" rel="stylesheet">

    <!--Favicon-->
    <link rel="icon" type="image/png" sizes="32x32" href="assets/img/MyFavicon32WhiteAlt.png">

    <!--Google reCaptcha-->  
    <script src="https://www.google.com/recaptcha/api.js"></script>
    <script>
      function onSubmit(token) {
        document.getElementById("contact-form").submit();
      }
    </script>


  </head>

  <body>
    <!--HEADER-->
    <header class="site-header">
      <!--Navbar-->
      <nav class="navbar">
        <!-- Navbar brand -->
        <div class="navbar-brand">
          <img src="assets/img/myLogo.png" id="wd-logo" alt="My Logo">
        </div>
        
        <!-- Linking Menu Text to Collapse Button -->
        <div class="menu-button">
          <button class="navbar-toggler button" type="button" data-toggle="collapse" data-target="#navbarSupportedContent20"
          aria-controls="navbarSupportedContent20" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-text">Menu</span>
          </button>
          
          <!-- Collapse Button -->
          <button class="navbar-toggler button animated-icon" type="button" data-toggle="collapse" data-target="#navbarSupportedContent20"
            aria-controls="navbarSupportedContent20" aria-expanded="false" aria-label="Toggle navigation">
              <span></span>
              <span></span>
              <span></span>
          </button>
          <!-- Collapse Button End -->
        </div>
        <!-- Linking Menu Text to Collapse Button End -->

        <!-- Collapsible content -->
        <div class="collapse navbar-collapse" id="navbarSupportedContent20">
          <!-- Links -->
          <ul class="navbar-nav">
            <li class="nav-item">
              <a class="nav-link" href="index.php">Home</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="contact.php">About</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="contact.php">Services</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="contact.php">Our Work</a>
            </li>
            <li class="nav-item active">
              <a class="nav-link" href="contact.php">Contact<span class="sr-only">(current)</span></a>
            </li>
          </ul>
          <!-- Links End -->
        </div>
        <!-- Collapsible Content End -->
      </nav>
      <!--Navbar End-->

    </header>
    <!--Header End-->

    <hr>

    <!--Content-->
    <section class="main">
 


<?php
  // This is the contact form
  // Message Vars
  $msg = '';
  $msgClass = '';

  // Check to see if the form has been submitted
  if(filter_has_var(INPUT_POST, 'submit')) {
    // Input Data Variables
    $firstname = htmlspecialchars($_POST['firstname']);
    $lastname = htmlspecialchars($_POST['lastname']);
    $phonenumber = htmlspecialchars($_POST['phonenumber']);
    $email = htmlspecialchars($_POST['email']);
    $dropdown = htmlspecialchars($_POST['selectdropdown']);
    $message = htmlspecialchars($_POST['message']);
    $checkbox = htmlspecialchars($_POST['checkbox'] ?? 0);


    // Check required fields
    if(!empty($firstname) && !empty($lastname) && !empty($phonenumber) && !empty($email) && !empty($dropdown) && !empty($message) && !empty($checkbox)) {
      // If passed, check email address

      if(filter_var($email, FILTER_VALIDATE_EMAIL) === false) { 
        // If failed, Email address is not valid
        $msg = 'Please use a valid email address';
        $msgClass = 'alert-danger';
      } else {

        // Recipient email address and information to be sent to them
        $toEmail = 'hello@example.co.uk';
        $subject = 'Contact Request from  Website';
        $body = '<h2>Contact Request</h2>
                <h4>Name</h4><p>'.$firstname.  ' '.$lastname.'</p>
                <h4>Phone Number</h4><p>'.$phonenumber.'</p>
                <h4>Email Address</h4><p>'.$email.'</p>
                <h4>Subject</h4><p>'.$dropdown.'</p>
                <h4>Message</h4><p>'.$message.'</p>';

        // Email Headers
        $headers = "MIME-VERSION: 1.0" ."\r\n";
        $headers .="Content-Type:text/html;charset=UTF-8" ."\r\n";

        // Additional Headers
        $headers .= "From: " .$firstname. "".$lastname." <".$email.">" ."\r\n"; 

        $recaptcha_url = "https://www.google.com/recaptcha/api/siteverify";
        $recaptcha_secret ="secrettoken";
        $recaptcha_response = $_POST['g-recaptcha-response'];

        $recaptcha = file_get_contents($recaptcha_url . '?secret=' . $recaptcha_secret . '&response=' . $recaptcha_response);
        $recaptcha = json_decode($recaptcha, true);

        if($recaptcha['success'] == 1 AND $recaptcha['score'] >= 0.5 AND $recaptcha['action'] == "submit") {
          
          if(mail($toEmail, $subject, $body, $headers)) {
            // Message Sent
            $msg = 'Verfication successful, your message has been sent';
            $msgClass = 'alert-success';
          } else {
            // Message failed
            $msg = 'Your message has NOT been sent';
            $msgClass = 'alert-danger';
          }
        }
      }  
    } else {
      // Failed
      $msg = 'Please fill in all fields';
      $msgClass = 'alert-danger';
    }
  }

?>

      <div class="container clearfix content-container">
        <h1 class="section-title">Contact Us</h1>
        <p>If you have any questions about the services we provide or would like to chat about a new website project, please get in touch using any of the options below. We would love to hear from you!</p>

        <!--Contact Page Row-->
        <div class="row">
          <div class="col-lg-6 contact-details">
            <div class="row">
              <div class="col-lg-12">
                <img src="assets/img/contact-us.jpg" class="img-responsive d-block contact-image" alt="Contact Us Image">
              </div>
            </div>
            <div class="row">
              <div class="col-lg-12 contact-name">
                <span class="d-inline-block contact-inline-block"><i class="fas fa-user fa-2x">
                </i></span>
                <span class="d-inline-block"><p class="contact-details">me</p></span>   
              </div>
            </div>
            <div class="row">
              <div class="col-lg-12 contact-phone">
                <span class="d-inline-block contact-inline-block"><a href="tel:01234 567890"><i class="fas fa-mobile-alt fa-2x"></i></a></span>
                <span class="d-inline-block"><a href="tel:01234 567890"><p class="contact-details">01234 567890</a></p></span>  
              </div>
            </div>
            <div class="row">
              <div class="col-lg-12 contact-email">
                <span class="d-inline-block contact-inline-block"><a href="mailhandler.php"><i class="fas fa-envelope-square fa-2x"></i></a></span>
                <span class="d-inline-block"><a href="mailhandler.php"><p class="contact-details">hello@wexample.co.uk</a></p></span>  
              </div>
            </div>
            <div class="row">
              <div class="col-lg-12 contact-fb">
                <span class="d-inline-block contact-inline-block"><a href="https://www.facebook.com/example/" target="_blank"><i class="fab fa-facebook-square fa-2x"></a></i></span>
                <span class="d-inline-block"><a href="https://www.facebook.com/example/" target="_blank"><p class="contact-details">@example</a></p></span> 
              </div>
            </div>
          </div>

          <!--Contact Form-->
          <div class="col-lg-6 contact-form d-block">
            <?php if($msg != ''): ?>
              <div class="alert <?php echo $msgClass; ?>"><?php echo $msg; ?></div>
            <?php endif;?>
            <form method="post" action="contact.php" role="form" id="contact-form">
              <div class=" row form-group">
                <div class="col-lg-6">
                  <label for="firstnameid">First name<span class="asterisk"> &#42;</span></label>
                  <input type="text" name="firstname" class="form-control mb-3" id="firstnameid">
                </div>
                <div class="col-lg-6">
                  <label for="lastnameid">Last name<span class="asterisk"> &#42;</span></label>
                  <input type="text" name="lastname" class="form-control mb-3" id="lastnameid">
                </div>
              </div>
              <div class="row form-group">
                <div class="col-lg-6">
                  <label for="phonenumber">Phone number<span class="asterisk"> &#42;</span></label>
                  <input type="tel" name="phonenumber" class="form-control mb-3" id="phonenumberid">
                </div>
                <div class="col-lg-6">
                  <label for="emailid">Email address<span class="asterisk"> &#42;</span></label>
                  <input type="email" name="email" class="form-control mb-3" id="emailid">
                </div>
              </div>
              <div class="row form-group">
                <div class="col-lg-12">
                  <label for="subjectid">How can we help<span class="asterisk"> &#42;</span></label>
                  <select class="form-control mb-3" name="selectdropdown" id="subjectid">
                    <option value="">Please choose an option</option>
                    <option value="I would like to discuss a project">I would like to discuss a project</option>
                    <option value="Existing Web 2 Digital client enquiry">Existing client enquiry</option>
                    <option value="General enquiry">General enquiry</option>
                  </select>
                </div>
              </div>
              <div class="row form-group">
                <div class="col-lg-12">
                  <label for="messageid">Tell us a little bit more<span class="asterisk"> &#42;</span></label>
                  <textarea name="message" class="form-control mb-3" id="messageid" rows="6"></textarea>
                </div>
              </div>
              <div class="row form-group">
                <div class="col-lg-12">
                  <p><span class="asterisk"> &#42;</span> indicates required field</p>
                </div>
              </div>
              <div class="row form-group">
                <div class="col-lg-12 form-check">
                  <input type="checkbox" name="checkbox" class="form-check-input" id="formcheckid">
                  <label for="formcheckid" class=form-check-label mb-3>By checking this tickbox you have confirmed that we can collect the information in this form for the purposes outlined in our <a href="privacypolicy.php">privacy policy.</a></label>
                </div>
              </div>
              <div class="row form-group">
                <div class="col-lg-12">
                  <button type="submit" name="submit" class="btn btn-primary mt-4 g-recaptcha" data-sitekey="sitetoken" data-callback='onSubmit' data-action='submit'>Send Message
                  </button>
                </div>
              </div>
            </form>
          </div>
          <!--Contact Form End-->
        </div>
        <!--Contact Page Row End-->
      </div>
      <!--Container end-->

<?php echo file_get_contents('footer.php'); ?>