Google reCAPTCHA php page

if($_POST){
    //this funtion sends your secret key and the token to get a json object response
    //with info about the form submission.
    function getCaptcha($SecretKey){
        $Response=file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=".SECRET_KEY."&response={$SecretKey}");
        $Return= json_decode($Response);
        return $Return;
        //for testing, you can run the following line to see the response from Google:
            var_dump($Response);
         }
    //here we are actually sending the info with the token...
    $Return=getCaptcha($_POST[g-recaptcha-response]);
     //if the return is success and the score is over 0.5 run your code!
     if($Return->success == true && $Return->score > 0.5){
//run your code here when submission is NOT a BOT...
    } else {
        echo "you are a bot and the world hates you";
    }
}