PHP 指定的 CGI 应用程序由于未返回完整的一组 HTTP 头而产生错误行为。
Security Alert! PHP CGI cannot be accessed directly.
This PHP CGI binary was compiled with force-cgi-redirect enabled. This means that a page will only be served up if the REDIRECT_STATUS CGI variable is set. This variable is set, for example, by Apache‘s Action directive redirect.
You may disable this restriction by recompiling the PHP binary with the --disable-force-cgi-redirect switch. If you do this and you have your PHP CGI binary accessible somewhere in your web tree, people will be able to circumvent .htaccess security by loading files through the PHP parser. A good way around this is to define doc_root in your php.ini file to something other than your top-level DOCUMENT_ROOT. This way you can separate the part of your web space which uses PHP from the normal part using .htaccess security. If you do not have any .htaccess restrictions anywhere on your site you can leave doc_root undefined. If you are running IIS, you may safely set cgi.force_redirect=0 in php.ini.
方法：php.info中 force_redirect=0 这句放到php.ini里就可以了
PHP ?指定的 CGI 应用程序由于未返回完整的一组 HTTP 头而产生错误行为。
原文地址：https://www.cnblogs.com/passerlee/p/8278853.html