因测试环境php遇到无法正常读取到https的域名，但是域名配置了ssl证书，故做如下排查。
php测试代码如下
$config[‘base_url‘] = ‘‘;#开启调试模式#echo "<pre>";print_r($_SERVER);die;$http_type = ((isset($_SERVER[‘HTTPS‘]) && $_SERVER[‘HTTPS‘] == ‘on‘) || (isset($_SERVER[‘HTTP_X_FORWARDED_PROTO‘]) && $_SERVER[‘HTTP_X_FORWARDED_PROTO‘] == ‘https‘)) ? ‘https://‘:"http://";define(‘HTTP_TYPE‘, $http_type);//定义当前域名使用协议是http还是httpsdefine(‘URL‘, $http_type.$_SERVER[‘HTTP_HOST‘]);define(‘OLD_URL‘, $http_type.$_SERVER[‘HTTP_HOST‘]);//老版本专用通过上述代码调试出来如下结果。
Array( ???[USER] => nginx ???[HOME] => /var/cache/nginx ???[HTTP_COOKIE] => ___rl__test__cookies=1533966737026; OUTFOX_SEARCH_USER_ID_NCOO=909839729.8454164; PHPSESSID=borlvm751o6fj00qgk8fhcejv3; PKBET_ORG=Y ???[HTTP_ACCEPT_LANGUAGE] => zh-CN,zh;q=0.9 ???[HTTP_ACCEPT_ENCODING] => gzip, deflate, br ???[HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8 ???[HTTP_USER_AGENT] => Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36 ???[HTTP_UPGRADE_INSECURE_REQUESTS] => 1 ???[HTTP_CACHE_CONTROL] => no-cache ???[HTTP_PRAGMA] => no-cache ???[HTTP_CONNECTION] => close ???[HTTP_X_FORWARDED_FOR] => xxx.xx.xxx.xx ???[HTTP_X_REAL_IP] => xxx.xx.xxx.xx ???[HTTP_HOST] => xxxx.com ???[REDIRECT_STATUS] => 200 ???[SERVER_NAME] => xxxx.com ???[SERVER_PORT] => 80 ???[SERVER_ADDR] => 10.10.10.208 ???[REMOTE_PORT] => 51618 ???[REMOTE_ADDR] => 10.10.10.207 ???[SERVER_SOFTWARE] => nginx/1.14.0 ???[GATEWAY_INTERFACE] => CGI/1.1 ???[REQUEST_SCHEME] => http ???[SERVER_PROTOCOL] => HTTP/1.0 ???[DOCUMENT_ROOT] => /data/www ???[DOCUMENT_URI] => /index.php ???[REQUEST_URI] => / ???[CONTENT_LENGTH] => ????[CONTENT_TYPE] => ????[REQUEST_METHOD] => GET ???[QUERY_STRING] => ????[PATH_INFO] => ????[SCRIPT_NAME] => /index.php ???[SCRIPT_FILENAME] => /data/www/index.php ???[FCGI_ROLE] => RESPONDER ???[PHP_SELF] => /index.php ???[REQUEST_TIME_FLOAT] => 1533971228.3193 ???[REQUEST_TIME] => 1533971228)确实没有打印到https被开启的相关内容，检查nginx反向代理配置文件的ssl配置部分。
upstream xxxx.com { ???????server 10.10.10.208:80;}server{ ???listen 443; ????server_name xxxx.com; ???ssl ?????????????????on; ???ssl_certificate ?????/etc/nginx/crt/xxxx.com/xxxx.com.crt; ???ssl_certificate_key ?/etc/nginx/crt/xxxx.com/xxxx.com.key; ???ssl_session_timeout ?5m; ???location / { ???????proxy_pass ????????http://xxxx.com; ???????proxy_set_header ??Host ????????????$host; ???????proxy_set_header ??X-Real-IP ???????$remote_addr; ???????proxy_set_header ??X-Forwarded-For ?$proxy_add_x_forwarded_for; ???}}发现上述配置文件ssl证书正常，但是PHP获取不到X-Forwarded-Proto或者HTTPS的变量值，尝试在反向代理配置中加入以下配置。
proxy_set_header ??X-Forwarded-Proto $scheme;再次通过php调试打印出现https内容。
[HTTP_X_FORWARDED_PROTO] => https[HTTPS] => on再次访问PHP的内容已经恢复正常。
php读取不到https的域名
原文地址：https://www.cnblogs.com/will-space/p/9460937.html