PHP form data not submitting with recaptcha - php

Question

I'm having some trouble setting up the recaptha with my limited PHP knowledge. I have managed to get it working in essence, but am finding that know my form data is not submitting.
Here is the PHP as it stands:
<?php
$sendToEmail="my#emailaddress.co.uk";
$yourname = $_POST["yourname"];
$timecall = $_POST["timecall"];
$email=$_POST["email"];
$phone=$_POST["phone"];
$message=$_POST["message"];
$content = "Time to Call : " . $timecall . "<br>";
$content .= "Name : " . $yourname . "<br>";
$content .= "Email : " . $email . "<br>";
$content .= "Phone : " . $phone . "<br>";
$content .= "Message : ". $message ."<br>";
$senderEmailId = "Reply-To: $email";
$senderEmailId = "From: $email\r\n";
$senderEmailId .= "Content-type: text/html\r\n";
$subject ="New Enquiry from the website";
if(isset($_POST['ContactButton'])) {
$url = 'https://www.google.com/recaptcha/api/siteverify';
$privatekey = "--private-key--";
$response = file_get_contents($url."?secret=".$privatekey."&response=".$_POST[g-recaptcha-response]."&remoteip=".$_SERVER['REMOTE_ADDR']);
$data = json_decode($response);
if (isset($data->success) AND $data->success==true) {
//// True- what happens when user is verified
header("Location:thankyou.php?CaptchaPass=True");
}else{
header("Location:thankyou.php?CaptchaFail=True");
}
}
?>
Thank you in advance!

Answer 1

PHP 101: array key strings which aren't quoted are treated as undefined constants. You have:
$_POST[g-recaptcha-response]
which is parsed/executed as
$_POST[g minus recaptcha minus response]
$_POST[0 minus 0 minus 0]
$_POST[0]
If you had PHP's debug options enabled (error_reporting, display_errors), you'd have been given warnings about this. These settings should NEVER be off on a debug/devel server in the first place.
Try
$_POST['g-recaptcha-response']
^--------------------^
instead. Note the quotes.