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<?php
class reCaptcha{
	const MISSING_INPUT_SECRET="missing-input-secret";
	const INVALID_INPUT_SECRET="missing-input-secret";
	const MISSING_INPUT_RESPONSE="missing-input-response";
	const INVALID_INPUT_RESPONSE="invalid-input-response";
	private $secret;
	private $error_code;
	function __construct($secret){
		$this->secret=$secret;
	}
	function CheckHumanFromPost(){
		if(!empty($_POST['g-recaptcha-response'])){
			return $this->IsHuman($_POST['g-recaptcha-response']);
		}else{
			$this->error_code=self::MISSING_INPUT_RESPONSE;
			return false;
		}
	}
	function IsHuman($g_recaptcha_response){
		$ch = curl_init('https://www.google.com/recaptcha/api/siteverify');
		//$ch = curl_init('http://192.168.10.71/Projects/gsreport/api/api.php');
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
		curl_setopt ($ch, CURLOPT_POST, 1);
		curl_setopt ($ch, CURLOPT_POSTFIELDS, "secret=".$this->secret."&response=$g_recaptcha_response&remoteip=".$_SERVER['REMOTE_ADDR']);
		$result = curl_exec($ch);
		curl_close ($ch);
			
		if(!empty($result)){
			$response=json_decode($result);
			if(is_object($response)){
				if($response->success){
					return true;
				}else{
					$er="error-codes";
					$errors=&$response->$er;
					if(!empty($errors[0])){
						$this->error_code=$errors[0];
					}
				}
			}else{
				$this->error_code="unknown";
			}
		}
		return false;
	}
	function IsErrorByErrorCode($errorcode){
		if($this->error_code==$errorcode){
			return true;
		}
		return false;
	}
	function GetErrorCode(){
		return $this->error_code;
	}

}