【PHP】【recaptcha】接入谷歌recaptcha v2验证码
本帖最后由 LeoWang2021 于 2021-8-4 22:39 编辑看到网上教程也很少，而且我自己用php编写时也遇到了很多问题，最终还是自己解决了感兴趣的可以看看
所以自己写了一套demo希望能帮到大家
下面是代码：
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<title></title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src='https://recaptcha.net/recaptcha/api.js'></script>
</head>
<body>
<form action="confirm.php" method="post"><!--登录表单-->
<div class="g-recaptcha" data-sitekey="【去谷歌注册获取SITE KEY站点密钥】"></div>
<p><button class="btn btn-primary" type="submit">Register</button>
</form>
</body>
</html>
confirm.php
<span style="font-size:14px;"><!DOCTYPE html>
<html lang="en">
<head>
<title></title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<?php
function dfsockopen($url, $limit = 0, $post = '', $cookie = '', $bysocket = FALSE, $ip = '', $timeout = 15, $block = TRUE, $encodetype= 'URLENCODE', $allowcurl = TRUE, $position = 0, $files = array())
{
require_once 'filesock.php';
return _dfsockopen($url, $limit, $post, $cookie, $bysocket, $ip, $timeout, $block, $encodetype, $allowcurl, $position, $files);
}
$post_data = array(
'secret' => '【去谷歌注册获取SECRET KEY私钥】',
'response' => $_POST["g-recaptcha-response"]);
$recaptcha_json_result = dfsockopen('https://recaptcha.net/recaptcha/api/siteverify', 0, $post_data);
$recaptcha_result = json_decode($recaptcha_json_result);
// 在这里处理返回的值
// var_dump($recaptcha_result);
?>
</head>
<body>
<?php
if($recaptcha_result->success)
{
echo '校验成功';
}
else
{
echo '校验失败';
}
?>
</body>
</html>
</span>
filesock.php
<?php
function _isLocalip($ip) {
$iplong = ip2long($ip);
return ($iplong >= 167772160 && $iplong <= 184549375) ||
($iplong >= 2886729728 && $iplong <= 2887778303) ||
($iplong >= 1681915904 && $iplong <= 1686110207) ||
($iplong >= 3232235520 && $iplong <= 3232301055) ||
($iplong >= 150994944 && $iplong <= 167772159);
}
function _parse_url($url) {
global $_G;
$tmp = parse_url($url);
if(!$tmp || empty($tmp['host'])) return false;
if(isset($tmp['user']) || isset($tmp['pass'])) return false;
if(strpbrk($tmp['host'], ':#?[]' ) !== false) return false;
if(!in_array(strtolower($tmp['scheme']), array('http', 'https'))) {
return false;
}
$config = $_G['config']['security']['fsockopensafe'];
$ip = gethostbyname($tmp['host']);
if($ip == $tmp['host']) {
return false;
}
if(filter_var($tmp['host'], FILTER_VALIDATE_IP) && _isLocalip($tmp['host'])) {
return false;
}
if(!empty($config['port']) && isset($tmp['port'])) {
if(isset($_SERVER['SERVER_PORT']) && !in_array($_SERVER['SERVER_PORT'], $config['port'])) {
$config['port'][] = $_SERVER['SERVER_PORT'];
}
if(!in_array($tmp['port'], $config['port'])) {
return false;
}
}
if(!isset($tmp['port'])) {
$tmp['port'] = strtolower($tmp['scheme']) == 'https' ? 443 : 80;
}
if($ip) {
if(!_isLocalip($ip)) {
$tmp['ip'] = $ip;
return $tmp;
}
} else {
return $tmp;
}
}
function _dfsockopen($url, $limit = 0, $post = '', $cookie = '', $bysocket = FALSE, $ip = '', $timeout = 15, $block = TRUE, $encodetype= 'URLENCODE', $allowcurl = TRUE, $position = 0, $files = array()) {
$return = '';
$matches = _parse_url($url);
if(!$matches) {
return '';
}
$ip = isset($matches['ip']) ? $matches['ip'] : $ip;
$scheme = $matches['scheme'];
$host = $matches['host'];
if($ip && _isLocalip($ip)) {
return '';
}
$path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/';
$port = !empty($matches['port']) ? $matches['port'] : ($scheme == 'http' ? '80' : '');
$boundary = $encodetype == 'URLENCODE' ? '' : random(40);
if($post) {
if(!is_array($post)) {
parse_str($post, $post);
}
_format_postkey($post, $postnew);
$post = $postnew;
}
if(function_exists('curl_init') && function_exists('curl_exec') && $allowcurl) {
$ch = curl_init();
$httpheader = array();
if($ip) {
$httpheader[] = "Host: ".$host;
}
$httpheader[] = "User-Agent: ".$_SERVER['HTTP_USER_AGENT'];
if($httpheader) {
curl_setopt($ch, CURLOPT_HTTPHEADER, $httpheader);
}
curl_setopt($ch, CURLOPT_URL, $scheme.'://'.($ip ? $ip : $host).($port ? ':'.$port : '').$path);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, 1);
if($post) {
curl_setopt($ch, CURLOPT_POST, 1);
if($encodetype == 'URLENCODE') {
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
} else {
foreach($post as $k => $v) {
if(isset($files[$k])) {
$post[$k] = '@'.$files[$k];
}
}
foreach($files as $k => $file) {
if(!isset($post[$k]) && file_exists($file)) {
$post[$k] = '@'.$file;
}
}
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
}
}
if($cookie) {
curl_setopt($ch, CURLOPT_COOKIE, $cookie);
}
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
$data = curl_exec($ch);
$status = curl_getinfo($ch);
$errno = curl_errno($ch);
curl_close($ch);
if($errno || $status['http_code'] != 200) {
return;
} else {
$GLOBALS['filesockheader'] = substr($data, 0, $status['header_size']);
$data = substr($data, $status['header_size']);
return !$limit ? $data : substr($data, 0, $limit);
}
}
if($post) {
if($encodetype == 'URLENCODE') {
$data = http_build_query($post);
} else {
$data = '';
foreach($post as $k => $v) {
$data .= "--$boundary\r\n";
$data .= 'Content-Disposition: form-data; name="'.$k.'"'.(isset($files[$k]) ? '; filename="'.basename($files[$k]).'"; Content-Type: application/octet-stream' : '')."\r\n\r\n";
$data .= $v."\r\n";
}
foreach($files as $k => $file) {
if(!isset($post[$k]) && file_exists($file)) {
if($fp = @fopen($file, 'r')) {
$v = fread($fp, filesize($file));
fclose($fp);
$data .= "--$boundary\r\n";
$data .= 'Content-Disposition: form-data; name="'.$k.'"; filename="'.basename($file).'"; Content-Type: application/octet-stream'."\r\n\r\n";
$data .= $v."\r\n";
}
}
}
$data .= "--$boundary\r\n";
}
$out = "POST $path HTTP/1.0\r\n";
$header = "Accept: */*\r\n";
$header .= "Accept-Language: zh-cn\r\n";
$header .= $encodetype == 'URLENCODE' ? "Content-Type: application/x-www-form-urlencoded\r\n" : "Content-Type: multipart/form-data; boundary=$boundary\r\n";
$header .= 'Content-Length: '.strlen($data)."\r\n";
$header .= "User-Agent: $_SERVER\r\n";
$header .= "Host: $host:$port\r\n";
$header .= "Connection: Close\r\n";
$header .= "Cache-Control: no-cache\r\n";
$header .= "Cookie: $cookie\r\n\r\n";
$out .= $header;
$out .= $data;
} else {
$out = "GET $path HTTP/1.0\r\n";
$header = "Accept: */*\r\n";
$header .= "Accept-Language: zh-cn\r\n";
$header .= "User-Agent: $_SERVER\r\n";
$header .= "Host: $host:$port\r\n";
$header .= "Connection: Close\r\n";
$header .= "Cookie: $cookie\r\n\r\n";
$out .= $header;
}
$fpflag = 0;
if(!$fp = @fsocketopen(($scheme == 'https' ? 'ssl://' : '').($scheme == 'https' ? $host : ($ip ? $ip : $host)), $port, $errno, $errstr, $timeout)) {
$context = array(
'http' => array(
'method' => $post ? 'POST' : 'GET',
'header' => $header,
'content' => $post,
'timeout' => $timeout,
),
);
$context = stream_context_create($context);
$fp = @fopen($scheme.'://'.($scheme == 'https' ? $host : ($ip ? $ip : $host)).':'.$port.$path, 'b', false, $context);
$fpflag = 1;
}
if(!$fp) {
return '';
} else {
stream_set_blocking($fp, $block);
stream_set_timeout($fp, $timeout);
@fwrite($fp, $out);
$status = stream_get_meta_data($fp);
if(!$status['timed_out']) {
while (!feof($fp) && !$fpflag) {
$header = @fgets($fp);
$headers .= $header;
if($header && ($header == "\r\n" ||$header == "\n")) {
break;
}
}
$GLOBALS['filesockheader'] = $headers;
if($position) {
for($i=0; $i<$position; $i++) {
$char = fgetc($fp);
if($char == "\n" && $oldchar != "\r") {
$i++;
}
$oldchar = $char;
}
}
if($limit) {
$return = stream_get_contents($fp, $limit);
} else {
$return = stream_get_contents($fp);
}
}
@fclose($fp);
return $return;
}
}
function _format_postkey($post, &$result, $key = '') {
foreach($post as $k => $v) {
$_k = $key ? $key.'['.$k.']' : $k;
if(is_array($v)) {
_format_postkey($v, $result, $_k);
} else {
$result[$_k] = $v;
}
}
}
?>
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