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<blockquote data-quote="Sly" data-source="post: 388966" data-attributes="member: 72035">Oh right? Do you mean reCapcha hasn't been enabled on my website? Heres my recapchalib.php[PHP]&lt;?php/*&nbsp;* This is a PHP library that handles calling reCAPTCHA.&nbsp;*&nbsp; &nbsp; - Documentation and latest version&nbsp;*&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; http://recaptcha.net/plugins/php/&nbsp;*&nbsp; &nbsp; - Get a reCAPTCHA API Key&nbsp;*&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; https://www.google.com/recaptcha/admin/create&nbsp;*&nbsp; &nbsp; - Discussion group&nbsp;*&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; http://groups.google.com/group/recaptcha&nbsp;*&nbsp;* Copyright (c) 2007 reCAPTCHA -- http://recaptcha.net&nbsp;* AUTHORS:&nbsp;*&nbsp;&nbsp; Mike Crawford&nbsp;*&nbsp;&nbsp; Ben Maurer&nbsp;*&nbsp;* Permission is hereby granted, free of charge, to any person obtaining a copy&nbsp;* of this software and associated documentation files (the &quot;Software&quot;), to deal&nbsp;* in the Software without restriction, including without limitation the rights&nbsp;* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell&nbsp;* copies of the Software, and to permit persons to whom the Software is&nbsp;* furnished to do so, subject to the following conditions:&nbsp;*&nbsp;* The above copyright notice and this permission notice shall be included in&nbsp;* all copies or substantial portions of the Software.&nbsp;*&nbsp;* THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR&nbsp;* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,&nbsp;* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE&nbsp;* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER&nbsp;* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,&nbsp;* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN&nbsp;* THE SOFTWARE.&nbsp;*//**&nbsp;* The reCAPTCHA server URL's&nbsp;*/define(&quot;RECAPTCHA_API_SERVER&quot;, &quot;http://www.google.com/recaptcha/api&quot;);define(&quot;RECAPTCHA_API_SECURE_SERVER&quot;, &quot;https://www.google.com/recaptcha/api&quot;);define(&quot;RECAPTCHA_VERIFY_SERVER&quot;, &quot;www.google.com&quot;);/**&nbsp;* Encodes the given data into a query string format&nbsp;* @param $data - array of string elements to be encoded&nbsp;* @return string - encoded request&nbsp;*/function _recaptcha_qsencode ($data) {&nbsp; &nbsp; &nbsp; &nbsp; $req = &quot;&quot;;&nbsp; &nbsp; &nbsp; &nbsp; foreach ( $data as $key =&gt; $value )&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $req .= $key . '=' . urlencode( stripslashes($value) ) . '&amp;';&nbsp; &nbsp; &nbsp; &nbsp; // Cut the last '&amp;'&nbsp; &nbsp; &nbsp; &nbsp; $req=substr($req,0,strlen($req)-1);&nbsp; &nbsp; &nbsp; &nbsp; return $req;}/**&nbsp;* Submits an HTTP POST to a reCAPTCHA server&nbsp;* @param string $host&nbsp;* @param string $path&nbsp;* @param array $data&nbsp;* @param int port&nbsp;* @return array response&nbsp;*/function _recaptcha_http_post($host, $path, $data, $port = 80) {&nbsp; &nbsp; &nbsp; &nbsp; $req = _recaptcha_qsencode ($data);&nbsp; &nbsp; &nbsp; &nbsp; $http_request&nbsp; = &quot;POST $path HTTP/1.0\r\n&quot;;&nbsp; &nbsp; &nbsp; &nbsp; $http_request .= &quot;Host: $host\r\n&quot;;&nbsp; &nbsp; &nbsp; &nbsp; $http_request .= &quot;Content-Type: application/x-www-form-urlencoded;\r\n&quot;;&nbsp; &nbsp; &nbsp; &nbsp; $http_request .= &quot;Content-Length: &quot; . strlen($req) . &quot;\r\n&quot;;&nbsp; &nbsp; &nbsp; &nbsp; $http_request .= &quot;User-Agent: reCAPTCHA/PHP\r\n&quot;;&nbsp; &nbsp; &nbsp; &nbsp; $http_request .= &quot;\r\n&quot;;&nbsp; &nbsp; &nbsp; &nbsp; $http_request .= $req;&nbsp; &nbsp; &nbsp; &nbsp; $response = '';&nbsp; &nbsp; &nbsp; &nbsp; if( false == ( $fs = @fsockopen($host, $port, $errno, $errstr, 10) ) ) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; die ('Could not open socket');&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; fwrite($fs, $http_request);&nbsp; &nbsp; &nbsp; &nbsp; while ( !feof($fs) )&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $response .= fgets($fs, 1160); // One TCP-IP packet&nbsp; &nbsp; &nbsp; &nbsp; fclose($fs);&nbsp; &nbsp; &nbsp; &nbsp; $response = explode(&quot;\r\n\r\n&quot;, $response, 2);&nbsp; &nbsp; &nbsp; &nbsp; return $response;}/**&nbsp;* Gets the challenge HTML (javascript and non-javascript version).&nbsp;* This is called from the browser, and the resulting reCAPTCHA HTML widget&nbsp;* is embedded within the HTML form it was called from.&nbsp;* @param string $pubkey A public key for reCAPTCHA&nbsp;* @param string $error The error given by reCAPTCHA (optional, default is null)&nbsp;* @param boolean $use_ssl Should the request be made over ssl? (optional, default is false)&nbsp;* @return string - The HTML to be embedded in the user's form.&nbsp;*/function recaptcha_get_html ($pubkey, $error = null, $use_ssl = false){&nbsp; &nbsp; if ($pubkey == null || $pubkey == '') {&nbsp; &nbsp; &nbsp; &nbsp; die (&quot;To use reCAPTCHA you must get an API key from &lt;a href='https://www.google.com/recaptcha/admin/create'&gt;https://www.google.com/recaptcha/admin/create&lt;/a&gt;&quot;);&nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; if ($use_ssl) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $server = RECAPTCHA_API_SECURE_SERVER;&nbsp; &nbsp; &nbsp; &nbsp; } else {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $server = RECAPTCHA_API_SERVER;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; $errorpart = &quot;&quot;;&nbsp; &nbsp; &nbsp; &nbsp; if ($error) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; $errorpart = &quot;&amp;amp;error=&quot; . $error;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; return '&lt;script type=&quot;text/javascript&quot; src=&quot;'. $server . '/challenge?k=' . $pubkey . $errorpart . '&quot;&gt;&lt;/script&gt;&nbsp; &nbsp; &lt;noscript&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;iframe src=&quot;'. $server . '/noscript?k=' . $pubkey . $errorpart . '&quot; height=&quot;300&quot; width=&quot;500&quot; frameborder=&quot;0&quot;&gt;&lt;/iframe&gt;&lt;br/&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;textarea name=&quot;recaptcha_challenge_field&quot; rows=&quot;3&quot; cols=&quot;40&quot;&gt;&lt;/textarea&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;input type=&quot;hidden&quot; name=&quot;recaptcha_response_field&quot; value=&quot;manual_challenge&quot;/&gt;&nbsp; &nbsp; &lt;/noscript&gt;';}/**&nbsp;* A ReCaptchaResponse is returned from recaptcha_check_answer()&nbsp;*/class ReCaptchaResponse {&nbsp; &nbsp; &nbsp; &nbsp; var $is_valid;&nbsp; &nbsp; &nbsp; &nbsp; var $error;}/**&nbsp; * Calls an HTTP POST function to verify if the user's guess was correct&nbsp; * @param string $privkey&nbsp; * @param string $remoteip&nbsp; * @param string $challenge&nbsp; * @param string $response&nbsp; * @param array $extra_params an array of extra variables to post to the server&nbsp; * @return ReCaptchaResponse&nbsp; */function recaptcha_check_answer ($privkey, $remoteip, $challenge, $response, $extra_params = array()){&nbsp; &nbsp; if ($privkey == null || $privkey == '') {&nbsp; &nbsp; &nbsp; &nbsp; die (&quot;To use reCAPTCHA you must get an API key from &lt;a href='https://www.google.com/recaptcha/admin/create'&gt;https://www.google.com/recaptcha/admin/create&lt;/a&gt;&quot;);&nbsp; &nbsp; }&nbsp; &nbsp; if ($remoteip == null || $remoteip == '') {&nbsp; &nbsp; &nbsp; &nbsp; die (&quot;For security reasons, you must pass the remote ip to reCAPTCHA&quot;);&nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //discard spam submissions&nbsp; &nbsp; &nbsp; &nbsp; if ($challenge == null || strlen($challenge) == 0 || $response == null || strlen($response) == 0) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $recaptcha_response = new ReCaptchaResponse();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $recaptcha_response-&gt;is_valid = false;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $recaptcha_response-&gt;error = 'incorrect-captcha-sol';&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return $recaptcha_response;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; $response = _recaptcha_http_post (RECAPTCHA_VERIFY_SERVER, &quot;/recaptcha/api/verify&quot;,&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; array (&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 'privatekey' =&gt; $privkey,&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 'remoteip' =&gt; $remoteip,&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 'challenge' =&gt; $challenge,&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 'response' =&gt; $response&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; ) + $extra_params&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; );&nbsp; &nbsp; &nbsp; &nbsp; $answers = explode (&quot;\n&quot;, $response [1]);&nbsp; &nbsp; &nbsp; &nbsp; $recaptcha_response = new ReCaptchaResponse();&nbsp; &nbsp; &nbsp; &nbsp; if (trim ($answers [0]) == 'true') {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $recaptcha_response-&gt;is_valid = true;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; else {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $recaptcha_response-&gt;is_valid = false;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $recaptcha_response-&gt;error = $answers [1];&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; return $recaptcha_response;}/**&nbsp;* gets a URL where the user can sign up for reCAPTCHA. If your application&nbsp;* has a configuration page where you enter a key, you should provide a link&nbsp;* using this function.&nbsp;* @param string $domain The domain where the page is hosted&nbsp;* @param string $appname The name of your application&nbsp;*/function recaptcha_get_signup_url ($domain = null, $appname = null) {&nbsp; &nbsp; return &quot;https://www.google.com/recaptcha/admin/create?&quot; .&nbsp; _recaptcha_qsencode (array ('domains' =&gt; $domain, 'app' =&gt; $appname));}function _recaptcha_aes_pad($val) {&nbsp; &nbsp; $block_size = 16;&nbsp; &nbsp; $numpad = $block_size - (strlen ($val) % $block_size);&nbsp; &nbsp; return str_pad($val, strlen ($val) + $numpad, chr($numpad));}/* Mailhide related code */function _recaptcha_aes_encrypt($val,$ky) {&nbsp; &nbsp; if (! function_exists (&quot;mcrypt_encrypt&quot;)) {&nbsp; &nbsp; &nbsp; &nbsp; die (&quot;To use reCAPTCHA Mailhide, you need to have the mcrypt php module installed.&quot;);&nbsp; &nbsp; }&nbsp; &nbsp; $mode=MCRYPT_MODE_CBC;&nbsp;&nbsp; &nbsp; &nbsp; $enc=MCRYPT_RIJNDAEL_128;&nbsp; &nbsp; $val=_recaptcha_aes_pad($val);&nbsp; &nbsp; return mcrypt_encrypt($enc, $ky, $val, $mode, &quot;\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0&quot;);}function _recaptcha_mailhide_urlbase64 ($x) {&nbsp; &nbsp; return strtr(base64_encode ($x), '+/', '-_');}/* gets the reCAPTCHA Mailhide url for a given email, public key and private key */function recaptcha_mailhide_url($pubkey, $privkey, $email) {&nbsp; &nbsp; if ($pubkey == '' || $pubkey == null || $privkey == &quot;&quot; || $privkey == null) {&nbsp; &nbsp; &nbsp; &nbsp; die (&quot;To use reCAPTCHA Mailhide, you have to sign up for a public and private key, &quot; .&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &quot;you can do so at &lt;a href='http://www.google.com/recaptcha/mailhide/apikey'&gt;http://www.google.com/recaptcha/mailhide/apikey&lt;/a&gt;&quot;);&nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; $ky = pack('H*', $privkey);&nbsp; &nbsp; $cryptmail = _recaptcha_aes_encrypt ($email, $ky);&nbsp; &nbsp; &nbsp; &nbsp; return &quot;http://www.google.com/recaptcha/mailhide/d?k=&quot; . $pubkey . &quot;&amp;c=&quot; . _recaptcha_mailhide_urlbase64 ($cryptmail);}/**&nbsp;* gets the parts of the email to expose to the user.&nbsp;* eg, given johndoe@example,com return [&quot;john&quot;, &quot;example.com&quot;].&nbsp;* the email is then displayed as john...@example.com&nbsp;*/function _recaptcha_mailhide_email_parts ($email) {&nbsp; &nbsp; $arr = preg_split(&quot;/@/&quot;, $email );&nbsp; &nbsp; if (strlen ($arr[0]) &lt;= 4) {&nbsp; &nbsp; &nbsp; &nbsp; $arr[0] = substr ($arr[0], 0, 1);&nbsp; &nbsp; } else if (strlen ($arr[0]) &lt;= 6) {&nbsp; &nbsp; &nbsp; &nbsp; $arr[0] = substr ($arr[0], 0, 3);&nbsp; &nbsp; } else {&nbsp; &nbsp; &nbsp; &nbsp; $arr[0] = substr ($arr[0], 0, 4);&nbsp; &nbsp; }&nbsp; &nbsp; return $arr;}/**&nbsp;* Gets html to display an email address given a public an private key.&nbsp;* to get a key, go to:&nbsp;*&nbsp;* http://www.google.com/recaptcha/mailhide/apikey&nbsp;*/function recaptcha_mailhide_html($pubkey, $privkey, $email) {&nbsp; &nbsp; $emailparts = _recaptcha_mailhide_email_parts ($email);&nbsp; &nbsp; $url = recaptcha_mailhide_url ($pubkey, $privkey, $email);&nbsp; &nbsp; &nbsp; &nbsp; return htmlentities($emailparts[0]) . &quot;&lt;a href='&quot; . htmlentities ($url) .&nbsp; &nbsp; &nbsp; &nbsp; &quot;' onclick=\&quot;window.open('&quot; . htmlentities ($url) . &quot;', '', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=500,height=300'); return false;\&quot; title=\&quot;Reveal this e-mail address\&quot;&gt;...&lt;/a&gt;@&quot; . htmlentities ($emailparts [1]);}?&gt;[/PHP]</blockquote>

[QUOTE="Sly, post: 388966, member: 72035"] Oh right? Do you mean reCapcha hasn't been enabled on my website? Heres my recapchalib.php [PHP]<?php /* * This is a PHP library that handles calling reCAPTCHA. * - Documentation and latest version * http://recaptcha.net/plugins/php/ * - Get a reCAPTCHA API Key * https://www.google.com/recaptcha/admin/create * - Discussion group * http://groups.google.com/group/recaptcha * * Copyright (c) 2007 reCAPTCHA -- http://recaptcha.net * AUTHORS: * Mike Crawford * Ben Maurer * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /** * The reCAPTCHA server URL's */ define("RECAPTCHA_API_SERVER", "http://www.google.com/recaptcha/api"); define("RECAPTCHA_API_SECURE_SERVER", "https://www.google.com/recaptcha/api"); define("RECAPTCHA_VERIFY_SERVER", "www.google.com"); /** * Encodes the given data into a query string format * @param $data - array of string elements to be encoded * @return string - encoded request */ function _recaptcha_qsencode ($data) { $req = ""; foreach ( $data as $key => $value ) $req .= $key . '=' . urlencode( stripslashes($value) ) . '&'; // Cut the last '&' $req=substr($req,0,strlen($req)-1); return $req; } /** * Submits an HTTP POST to a reCAPTCHA server * @param string $host * @param string $path * @param array $data * @param int port * @return array response */ function _recaptcha_http_post($host, $path, $data, $port = 80) { $req = _recaptcha_qsencode ($data); $http_request = "POST $path HTTP/1.0\r\n"; $http_request .= "Host: $host\r\n"; $http_request .= "Content-Type: application/x-www-form-urlencoded;\r\n"; $http_request .= "Content-Length: " . strlen($req) . "\r\n"; $http_request .= "User-Agent: reCAPTCHA/PHP\r\n"; $http_request .= "\r\n"; $http_request .= $req; $response = ''; if( false == ( $fs = @fsockopen($host, $port, $errno, $errstr, 10) ) ) { die ('Could not open socket'); } fwrite($fs, $http_request); while ( !feof($fs) ) $response .= fgets($fs, 1160); // One TCP-IP packet fclose($fs); $response = explode("\r\n\r\n", $response, 2); return $response; } /** * Gets the challenge HTML (javascript and non-javascript version). * This is called from the browser, and the resulting reCAPTCHA HTML widget * is embedded within the HTML form it was called from. * @param string $pubkey A public key for reCAPTCHA * @param string $error The error given by reCAPTCHA (optional, default is null) * @param boolean $use_ssl Should the request be made over ssl? (optional, default is false) * @return string - The HTML to be embedded in the user's form. */ function recaptcha_get_html ($pubkey, $error = null, $use_ssl = false) { if ($pubkey == null || $pubkey == '') { die ("To use reCAPTCHA you must get an API key from <a href='https://www.google.com/recaptcha/admin/create'>https://www.google.com/recaptcha/admin/create</a>"); } if ($use_ssl) { $server = RECAPTCHA_API_SECURE_SERVER; } else { $server = RECAPTCHA_API_SERVER; } $errorpart = ""; if ($error) { $errorpart = "&error=" . $error; } return '<script type="text/javascript" src="'. $server . '/challenge?k=' . $pubkey . $errorpart . '"></script> <noscript> <iframe src="'. $server . '/noscript?k=' . $pubkey . $errorpart . '" height="300" width="500" frameborder="0"></iframe> <textarea name="recaptcha_challenge_field" rows="3" cols="40"></textarea> <input type="hidden" name="recaptcha_response_field" value="manual_challenge"/> </noscript>'; } /** * A ReCaptchaResponse is returned from recaptcha_check_answer() */ class ReCaptchaResponse { var $is_valid; var $error; } /** * Calls an HTTP POST function to verify if the user's guess was correct * @param string $privkey * @param string $remoteip * @param string $challenge * @param string $response * @param array $extra_params an array of extra variables to post to the server * @return ReCaptchaResponse */ function recaptcha_check_answer ($privkey, $remoteip, $challenge, $response, $extra_params = array()) { if ($privkey == null || $privkey == '') { die ("To use reCAPTCHA you must get an API key from <a href='https://www.google.com/recaptcha/admin/create'>https://www.google.com/recaptcha/admin/create</a>"); } if ($remoteip == null || $remoteip == '') { die ("For security reasons, you must pass the remote ip to reCAPTCHA"); } //discard spam submissions if ($challenge == null || strlen($challenge) == 0 || $response == null || strlen($response) == 0) { $recaptcha_response = new ReCaptchaResponse(); $recaptcha_response->is_valid = false; $recaptcha_response->error = 'incorrect-captcha-sol'; return $recaptcha_response; } $response = _recaptcha_http_post (RECAPTCHA_VERIFY_SERVER, "/recaptcha/api/verify", array ( 'privatekey' => $privkey, 'remoteip' => $remoteip, 'challenge' => $challenge, 'response' => $response ) + $extra_params ); $answers = explode ("\n", $response [1]); $recaptcha_response = new ReCaptchaResponse(); if (trim ($answers [0]) == 'true') { $recaptcha_response->is_valid = true; } else { $recaptcha_response->is_valid = false; $recaptcha_response->error = $answers [1]; } return $recaptcha_response; } /** * gets a URL where the user can sign up for reCAPTCHA. If your application * has a configuration page where you enter a key, you should provide a link * using this function. * @param string $domain The domain where the page is hosted * @param string $appname The name of your application */ function recaptcha_get_signup_url ($domain = null, $appname = null) { return "https://www.google.com/recaptcha/admin/create?" . _recaptcha_qsencode (array ('domains' => $domain, 'app' => $appname)); } function _recaptcha_aes_pad($val) { $block_size = 16; $numpad = $block_size - (strlen ($val) % $block_size); return str_pad($val, strlen ($val) + $numpad, chr($numpad)); } /* Mailhide related code */ function _recaptcha_aes_encrypt($val,$ky) { if (! function_exists ("mcrypt_encrypt")) { die ("To use reCAPTCHA Mailhide, you need to have the mcrypt php module installed."); } $mode=MCRYPT_MODE_CBC; $enc=MCRYPT_RIJNDAEL_128; $val=_recaptcha_aes_pad($val); return mcrypt_encrypt($enc, $ky, $val, $mode, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); } function _recaptcha_mailhide_urlbase64 ($x) { return strtr(base64_encode ($x), '+/', '-_'); } /* gets the reCAPTCHA Mailhide url for a given email, public key and private key */ function recaptcha_mailhide_url($pubkey, $privkey, $email) { if ($pubkey == '' || $pubkey == null || $privkey == "" || $privkey == null) { die ("To use reCAPTCHA Mailhide, you have to sign up for a public and private key, " . "you can do so at <a href='http://www.google.com/recaptcha/mailhide/apikey'>http://www.google.com/recaptcha/mailhide/apikey</a>"); } $ky = pack('H*', $privkey); $cryptmail = _recaptcha_aes_encrypt ($email, $ky); return "http://www.google.com/recaptcha/mailhide/d?k=" . $pubkey . "&c=" . _recaptcha_mailhide_urlbase64 ($cryptmail); } /** * gets the parts of the email to expose to the user. * eg, given johndoe@example,com return ["john", "example.com"]. * the email is then displayed as john...@example.com */ function _recaptcha_mailhide_email_parts ($email) { $arr = preg_split("/@/", $email ); if (strlen ($arr[0]) <= 4) { $arr[0] = substr ($arr[0], 0, 1); } else if (strlen ($arr[0]) <= 6) { $arr[0] = substr ($arr[0], 0, 3); } else { $arr[0] = substr ($arr[0], 0, 4); } return $arr; } /** * Gets html to display an email address given a public an private key. * to get a key, go to: * * http://www.google.com/recaptcha/mailhide/apikey */ function recaptcha_mailhide_html($pubkey, $privkey, $email) { $emailparts = _recaptcha_mailhide_email_parts ($email); $url = recaptcha_mailhide_url ($pubkey, $privkey, $email); return htmlentities($emailparts[0]) . "<a href='" . htmlentities ($url) . "' onclick=\"window.open('" . htmlentities ($url) . "', '', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=500,height=300'); return false;\" title=\"Reveal this e-mail address\">...</a>@" . htmlentities ($emailparts [1]); } ?> [/PHP] [/QUOTE]

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