So... I decided to use reCAPTCHA on my website and it returns only false when it's JSON decoding, just like that:
$secretKey = "***********";
$responseKey = $_POST['g-recaptcha-response'];
$url = 'https://www.google.com/recaptcha/api/siteverify?
secret='.$secretKey.'&response='.$responseKey.'';
$response = file_get_contents($url);
$response = json_decode($response);
if ($response->{'succes'} == 'true') {
$_SESSION['response'] = "succes";
} else {
$_SESSION['response'] = "fail";
}
It always writes "fail"
But when it's not json decoding:
$secretKey = "**************";
$responseKey = $_POST['g-recaptcha-response'];
$response = file_get_contents('https://www.google.com/recaptcha/api/siteverify?secret='.$secretKey.'&response='.$responseKey.'');
$_SESSION['response'] = $response;
It returns true: { "success": true, "challenge_ts": "2018-05-07T19:54:43Z", "hostname": "mywebsite.com" }
And second problem is that ERR_EMPTY_RESPONSE error, when I load action page. It occurs only when there's that reCAPTCHA stuff.
My post:
<form method="post" id="form" class="form" action="action/logreg.php">
<input name="name" class="name" placeholder="Jméno" type="text" />
<input name="surname" class="surname" placeholder="Přijmení" type="text"/>
<input name="email" class="email" placeholder="E-mail" type="email" />
<input name="psswd" class="psswd" placeholder="Heslo" type="password"/>
<button type="submit"name="regBtn" class="regBtn">Registrovat</button>
<div class="g-recaptcha" data-sitekey="*********"></div>
</form>