效果图：
类Geetestlib.class.php
<?php
/**
* 极验验证类
* @category ORG
* @package ORG
* @subpackage Net
* @author liujing <liujin0506@qq.com>
*/
class Geetestlib {
public function geetest_validate($challenge, $validate, $seccode, $key) {
$apiserver = 'api.geetest.com';
if (strlen($validate) > 0 && $this->check_result_by_private($challenge, $validate, $key)) {
$query = 'seccode='.$seccode;
$servervalidate = $this->http_post($apiserver, '/validate.php', $query);
if (strlen($servervalidate) > 0 && $servervalidate == md5($seccode)) {
return TRUE;
}
}
return FALSE;
}
private function check_result_by_private($origin, $validate, $key) {
return $validate == md5($key.'geetest'.$origin) ? TRUE : FALSE;
}
private function http_post($host, $path, $data, $port = 80) {
// $data = $this->fix_encoding($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";
$http_request .= "Content-Length: " . strlen($data) . "\r\n";
$http_request .= "\r\n";
$http_request .= $data;
$response = '';
if (($fs = @fsockopen($host, $port, $errno, $errstr, 10)) == false) {
die ('Could not open socket! ' . $errstr);
}
fwrite($fs, $http_request);
while (!feof($fs))
$response .= fgets($fs, 1160);
fclose($fs);
$response = explode("\r\n\r\n", $response, 2);
return $response[1];
}
private function fix_encoding($str) {
$curr_encoding = mb_detect_encoding($str) ;
if($curr_encoding == "UTF-8" && mb_check_encoding($str,"UTF-8")) {
return $str;
} else {
return utf8_encode($str);
}
}
}
?>控制器处理代码：import('ORG.Net.Geetestlib');
$verify = new Geetestlib();
$key = C('verifykey');
$validate_response = $verify->geetest_validate(@$_POST['geetest_challenge'], @$_POST['geetest_validate'], @$_POST['geetest_seccode'],$key);
if(empty($validate_response)) {
$this->error('验证码错误！');
}前端处理代码：<script async defer type="text/javascript" src="http://api.geetest.com/get.php?gt={$Think.config.verifyid}&product=popup&popupbtnid=button"></script>（这里注意id的绑定） 