89 lines
2.8 KiB
PHP
89 lines
2.8 KiB
PHP
<?php
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namespace Nibble\NibbleForms\Field;
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use Nibble\NibbleForms\Field;
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class Captcha extends Field
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{
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public $error = array();
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protected $label;
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public function __construct($label = 'Humanity Check')
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{
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$this->label = $label;
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}
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public function returnField($form_name, $name, $value = '')
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{
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$field = <<<FIELD
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<script type="text/javascript"
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src="http://www.google.com/recaptcha/api/challenge?k=%1\$s">
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</script>
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<noscript>
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<iframe src="http://www.google.com/recaptcha/api/noscript?k=%1\$s"
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height="300" width="500" frameborder="0"></iframe><br>
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<textarea name="recaptcha_challenge_field" rows="3" cols="40">
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</textarea>
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<input type="hidden" name="{$form_name}[recaptcha_response_field]"
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value="manual_challenge">
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</noscript>
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FIELD;
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$class = !empty($this->error) ? ' class="error"' : '';
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return array(
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'messages' => !empty($this->custom_error) && !empty($this->error) ? $this->custom_error : $this->error,
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'label' => $this->label == false ? false : sprintf('<label for="%s"%s>%s</label>', $name, $class, $this->label),
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'field' => sprintf($field, 'YOUR_PUBLIC_KEY'),
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'html' => $this->html
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);
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}
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public function validate($val)
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{
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$url = 'http://www.google.com/recaptcha/api/verify';
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$data = array(
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'privatekey' => urlencode('YOUR_PRIVATE_KEY'),
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'remoteip' => urlencode($_SERVER['REMOTE_ADDR']),
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'challenge' => urlencode($_REQUEST['recaptcha_challenge_field']),
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'response' => urlencode($_REQUEST['recaptcha_response_field']),
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);
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$data_string = '';
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foreach ($data as $key => $val) {
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$data_string .= $key . '=' . $val . '&';
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}
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$data_string = rtrim($data_string, '&');
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$host = 'www.google.com';
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$http_request = "POST /recaptcha/api/verify HTTP/1.0\r\n";
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$http_request .= "Host: $host\r\n";
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$http_request .= "Content-Type: application/x-www-form-urlencoded;\r\n";
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$http_request .= "Content-Length: " . strlen($data_string) . "\r\n";
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$http_request .= "User-Agent: reCAPTCHA/PHP\r\n";
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$http_request .= "\r\n";
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$http_request .= $data_string;
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$response = '';
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if (false == ( $fs = @fsockopen($host, 80, $errno, $errstr, 10) )) {
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die('Could not open socket');
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}
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fwrite($fs, $http_request);
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while (!feof($fs)) {
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$response .= fgets($fs, 1160); // One TCP-IP packet
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}
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fclose($fs);
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$response = explode("\r\n\r\n", $response);
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$response = explode("\n", $response[1]);
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if (!isset($response[0]) || $response[0] != 'true') {
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$this->error[] = 'You failed to prove you humanity';
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}
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//curl_close($ch);
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return empty($this->error) ? true : false;
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}
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}
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