Adding reCAPTCHA v2 into my PHP file

phphtmlcaptcharecaptcha


PHP Snippet 1:

<?php
     if(isset($_POST['full_name']) && isset($_POST['full_name']) ){
        $full_name = $_POST['full_name']; 
         $email = $_POST['email'];
         $from_name_email = $full_name . '<'.$email.'>';
     }
     if(isset($_POST['subject'])){
        $subject = $_POST['subject'];
     }
    if(isset($_POST['message'])){
        $message = $_POST['message'];
    }
     }if(isset($_POST['g-recaptcha-response'])){
        $captcha=$_POST['g-recaptcha-response'];
        $to = "[email protected]";
        $subject = "Contact Form";
        $headers .= 'From: ' . $from_name_email . "\r\n";
    }
    if(!$captcha){
        echo 'Please check the the captcha form.';
        exit;
    }
    $response=file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=YOUR SECRET KEY GOES HERE&response=".$captcha."&remoteip=".$_SERVER['REMOTE_ADDR']);
            if($response.success==false)
            {
              echo 'You are spammer!';
            }else
            {
        mail ($to, $subject, $message, $headers);

        echo "Your message has been sent! Thank you.";
            }  
    ?>

PHP Snippet 2:

<?php
 if(isset($_POST['full_name']) && isset($_POST['full_name']) ){
    $full_name = $_POST['full_name']; 
     $email = $_POST['email'];
     $from_name_email = $full_name . '<'.$email.'>';
 }
 if(isset($_POST['subject'])){
    $subject = $_POST['subject'];
 }
if(isset($_POST['message'])){
    $message = $_POST['message'];
}
 }if(isset($_POST['g-recaptcha-response'])){
    $captcha=$_POST['g-recaptcha-response'];
    $to = "[email protected]";
    $subject = "Contact Form";
    $headers .= 'From: ' . $from_name_email . "\r\n";
}
if(!$captcha){
    echo 'Please check the the captcha form.';
    exit;
}
//change is here
$response=file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=USE PRIVATE KEY HERE&response=".$_POST['g-recaptcha-response'."&remoteip=".$_SERVER['REMOTE_ADDR']);
        //change is here
        $response = json_decode($response);
        //change is here
        if($response->success==false)
        {
          echo 'You are spammer!';
        }else
        {
    mail ($to, $subject, $message, $headers);

    echo "Your message has been sent! Thank you.";
        }  
?>

PHP Snippet 3:

 if(!isset($_POST['g-recaptcha-response']) || empty($_POST['g-recaptcha-response'])) {
        echo 'reCAPTHCA verification failed, please try again.';
    } else {
        $secret = 'google_secret_key';

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, 'https://www.google.com/recaptcha/api/siteverify?secret='.$secret.'&response='.$_POST['g-recaptcha-response']);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $response = curl_exec($ch);
        curl_close($ch);
        $response = json_decode($response);

        if($response->success) {
            // What happens when the CAPTCHA was entered incorrectly
            echo 'Successful .';
        } else {
            // Your code here to handle a successful verification
            echo 'reCAPTHCA verification failed, please try again.';
        }
    }

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