phpengine/lib/f3/web/google/recaptcha.php

<?php

/*

	Copyright (c) 2009-2017 F3::Factory/Bong Cosca, All rights reserved.

	This file is part of the Fat-Free Framework (http://fatfreeframework.com).

	This is free software: you can redistribute it and/or modify it under the
	terms of the GNU General Public License as published by the Free Software
	Foundation, either version 3 of the License, or later.

	Fat-Free Framework is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License along
	with Fat-Free Framework.  If not, see <http://www.gnu.org/licenses/>.

*/

namespace Web\Google;

//! Google ReCAPTCHA v2 plug-in
class Recaptcha {

	const
		//! API URL
		URL_Recaptcha='https://www.google.com/recaptcha/api/siteverify';

	/**
	 *	Verify reCAPTCHA response
	 *	@param string $secret
	 *	@param string $response
	 *	@return bool
	 **/
	static function verify($secret,$response=NULL) {
		$fw=\Base::instance();
		if (!isset($response))
			$response=$fw->{'POST.g-recaptcha-response'};
		if (!$response)
			return FALSE;
		$web=\Web::instance();
		$out=$web->request(self::URL_Recaptcha,[
			'method'=>'POST',
			'content'=>http_build_query([
				'secret'=>$secret,
				'response'=>$response,
				'remoteip'=>$fw->IP
			]),
		]);
		return isset($out['body']) &&
			($json=json_decode($out['body'],TRUE)) &&
			isset($json['success']) && $json['success'];
	}

}