s2member / includes / classes / utils-captchas.inc.php

utils-captchas.inc.php in s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions 120213, at includes/classes/utils-captchas.inc.php

87 lines 3.8 KB

Raw Download Zip

1	<?php
2	/**
3	* Captcha utilities.
4	*
5	* Copyright: © 2009-2011
6	* {@link http://www.websharks-inc.com/ WebSharks, Inc.}
7	* ( coded in the USA )
8	*
9	* Released under the terms of the GNU General Public License.
10	* You should have received a copy of the GNU General Public License,
11	* along with this software. In the main directory, see: /licensing/
12	* If not, see: {@link http://www.gnu.org/licenses/}.
13	*
14	* @package s2Member\Utilities
15	* @since 3.5
16	*/
17	if (realpath (__FILE__) === realpath ($_SERVER["SCRIPT_FILENAME"]))
18	exit ("Do not access this file directly.");
19	/**/
20	if (!class_exists ("c_ws_plugin__s2member_utils_captchas"))
21	{
22	/**
23	* Captcha utilities.
24	*
25	* @package s2Member\Utilities
26	* @since 3.5
27	*/
28	class c_ws_plugin__s2member_utils_captchas
29	{
30	/**
31	* Public/private keys to use for reCAPTCHA™.
32	*
33	* @package s2Member\Utilities
34	* @since 111203
35	*
36	* @return array An array with with two elements: `public` and `private`.
37	*/
38	public static function recaptcha_keys ()
39	{
40	$public = $GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["recaptcha"]["public_key"];
41	$private = /* Private key. */ $GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["recaptcha"]["private_key"];
42	/**/
43	return apply_filters ("ws_plugin__s2member_recaptcha_keys", array ("public" => $public, "private" => $private), get_defined_vars ());
44	}
45	/**
46	* Verifies a reCAPTCHA™ code via Google®.
47	*
48	* @package s2Member\Utilities
49	* @since 3.5
50	*
51	* @param str $challenge The value of `recaptcha_challenge_field` during form submisson.
52	* @param str $response The value of `recaptcha_response_field` during form submission.
53	* @return bool True if ``$response`` is valid, else false.
54	*/
55	public static function recaptcha_code_validates ($challenge = FALSE, $response = FALSE)
56	{
57	$keys = c_ws_plugin__s2member_utils_captchas::recaptcha_keys ();
58	$post_vars = array ("privatekey" => $keys["private"], "remoteip" => $_SERVER["REMOTE_ADDR"], "challenge" => $challenge, "response" => $response);
59	/**/
60	return preg_match ("/^true/i", trim (c_ws_plugin__s2member_utils_urls::remote ("http://www.google.com/recaptcha/api/verify", $post_vars)));
61	}
62	/**
63	* Builds a reCAPTCHA™ JavaScript `script` tag for display.
64	*
65	* @package s2Member\Utilities
66	* @since 3.5
67	*
68	* @param str $theme Optional. The theme used in display. Defaults to `clean`.
69	* @param str $tabindex Optional. Value of `tabindex=""` attribute. Defaults to `-1`.
70	* @param str $error Optional. An error message to display.
71	* @return str HTML markup for JavaScript tag.
72	*/
73	public static function recaptcha_script_tag ($theme = FALSE, $tabindex = FALSE, $error = FALSE)
74	{
75	$theme = ($theme) ? $theme : "clean";
76	$tabindex = (strlen ($tabindex)) ? (int)$tabindex : -1;
77	$keys = c_ws_plugin__s2member_utils_captchas::recaptcha_keys ();
78	/**/
79	$options = '<script type="text/javascript">' . "if(typeof RecaptchaOptions !== 'object'){ var RecaptchaOptions = {theme: '" . c_ws_plugin__s2member_utils_strings::esc_js_sq ($theme) . "', lang: '" . c_ws_plugin__s2member_utils_strings::esc_js_sq ($GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["recaptcha"]["lang"]) . "', tabindex: " . $tabindex . " }; }" . '</script>' . "\n";
80	$no_tabindex_icons = '<script type="text/javascript">' . "if(typeof jQuery === 'function'){ jQuery('td a[id^=\"recaptcha\"]').removeAttr('tabindex'); }" . '</script>';
81	$adjustments = (!apply_filters ("c_ws_plugin__s2member_utils_tabindex_recaptcha_icons", false, get_defined_vars ())) ? $no_tabindex_icons : "";
82	/**/
83	return $options . '<script type="text/javascript" src="' . esc_attr ('https://www.google.com/recaptcha/api/challenge?k=' . urlencode ($keys["public"])) . '' . (($error) ? '&error=' . urlencode ($error) : '') . '"></script>' . $adjustments;
84	}
85	}
86	}
87	?>