# s2member/120213/includes/classes/utils-captchas.inc.php

s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions, version 120213. 87 lines.

- Page: https://pluginprobe.com/plugins/s2member/120213/code/includes/classes/utils-captchas.inc.php
- Raw: https://pluginprobe.com/plugins/s2member/120213/raw/includes/classes/utils-captchas.inc.php
- Modified: 2012-02-14T02:48:06+00:00

Line numbers below start at 1. Link to a line or a range by appending a fragment to the
page URL, for example `https://pluginprobe.com/plugins/s2member/120213/code/includes/classes/utils-captchas.inc.php#L10-L20`.

```php
<?php
/**
* Captcha utilities.
*
* Copyright: © 2009-2011
* {@link http://www.websharks-inc.com/ WebSharks, Inc.}
* ( coded in the USA )
*
* Released under the terms of the GNU General Public License.
* You should have received a copy of the GNU General Public License,
* along with this software. In the main directory, see: /licensing/
* If not, see: {@link http://www.gnu.org/licenses/}.
*
* @package s2Member\Utilities
* @since 3.5
*/
if (realpath (__FILE__) === realpath ($_SERVER["SCRIPT_FILENAME"]))
	exit ("Do not access this file directly.");
/**/
if (!class_exists ("c_ws_plugin__s2member_utils_captchas"))
	{
		/**
		* Captcha utilities.
		*
		* @package s2Member\Utilities
		* @since 3.5
		*/
		class c_ws_plugin__s2member_utils_captchas
			{
				/**
				* Public/private keys to use for reCAPTCHA™.
				*
				* @package s2Member\Utilities
				* @since 111203
				*
				* @return array An array with with two elements: `public` and `private`.
				*/
				public static function recaptcha_keys ()
					{
						$public = $GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["recaptcha"]["public_key"];
						$private = /* Private key. */ $GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["recaptcha"]["private_key"];
						/**/
						return apply_filters ("ws_plugin__s2member_recaptcha_keys", array ("public" => $public, "private" => $private), get_defined_vars ());
					}
				/**
				* Verifies a reCAPTCHA™ code via Google®.
				*
				* @package s2Member\Utilities
				* @since 3.5
				*
				* @param str $challenge The value of `recaptcha_challenge_field` during form submisson.
				* @param str $response The value of `recaptcha_response_field` during form submission. 
				* @return bool True if ``$response`` is valid, else false.
				*/
				public static function recaptcha_code_validates ($challenge = FALSE, $response = FALSE)
					{
						$keys = c_ws_plugin__s2member_utils_captchas::recaptcha_keys ();
						$post_vars = array ("privatekey" => $keys["private"], "remoteip" => $_SERVER["REMOTE_ADDR"], "challenge" => $challenge, "response" => $response);
						/**/
						return preg_match ("/^true/i", trim (c_ws_plugin__s2member_utils_urls::remote ("http://www.google.com/recaptcha/api/verify", $post_vars)));
					}
				/**
				* Builds a reCAPTCHA™ JavaScript `script` tag for display.
				*
				* @package s2Member\Utilities
				* @since 3.5
				*
				* @param str $theme Optional. The theme used in display. Defaults to `clean`.
				* @param str $tabindex Optional. Value of `tabindex=""` attribute. Defaults to `-1`.
				* @param str $error Optional. An error message to display.
				* @return str HTML markup for JavaScript tag.
				*/
				public static function recaptcha_script_tag ($theme = FALSE, $tabindex = FALSE, $error = FALSE)
					{
						$theme = ($theme) ? $theme : "clean";
						$tabindex = (strlen ($tabindex)) ? (int)$tabindex : -1;
						$keys = c_ws_plugin__s2member_utils_captchas::recaptcha_keys ();
						/**/
						$options = '<script type="text/javascript">' . "if(typeof RecaptchaOptions !== 'object'){ var RecaptchaOptions = {theme: '" . c_ws_plugin__s2member_utils_strings::esc_js_sq ($theme) . "', lang: '" . c_ws_plugin__s2member_utils_strings::esc_js_sq ($GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["recaptcha"]["lang"]) . "', tabindex: " . $tabindex . " }; }" . '</script>' . "\n";
						$no_tabindex_icons = '<script type="text/javascript">' . "if(typeof jQuery === 'function'){ jQuery('td a[id^=\"recaptcha\"]').removeAttr('tabindex'); }" . '</script>';
						$adjustments = (!apply_filters ("c_ws_plugin__s2member_utils_tabindex_recaptcha_icons", false, get_defined_vars ())) ? $no_tabindex_icons : "";
						/**/
						return $options . '<script type="text/javascript" src="' . esc_attr ('https://www.google.com/recaptcha/api/challenge?k=' . urlencode ($keys["public"])) . '' . (($error) ? '&amp;error=' . urlencode ($error) : '') . '"></script>' . $adjustments;
					}
			}
	}
?>
```