参考腾讯云官方文档：

人脸核身 获取 Access Token_腾讯云

public function getAccessToken(){$data = ['appId' => '', //WBappid,https://cloud.tencent.com/document/product/1007/49634'secret' => '','grant_type' => 'client_credential', //授权类型'version' => '1.0.0'];$str = http_build_query($data);$url = 'https://kyc1.qcloud.com/api/oauth2/access_token?'.$str;$result = $this->cmf_curl_get($url);$access_token = '';$arr = json_decode($result,true);if($arr['code'] == 0){$access_token = $arr['access_token'];// 存入磁盘  file_put_contents('/data/config/tx_face_accesstoken.txt',$access_token);}}function cmf_curl_get($url){$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_FAILONERROR, true);curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);curl_setopt($ch, CURLOPT_AUTOREFERER, true);curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);curl_setopt($ch, CURLOPT_TIMEOUT, 5);$SSL = substr($url, 0, 8) == "https://" ? true : false;if ($SSL) {curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 信任任何证书curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2); // 检查证书中是否设置域名}$content = curl_exec($ch);curl_close($ch);return $content;
}