Nginx - PHP https painless setup

php

location ~ \.php {
    fastcgi_param  QUERY_STRING       $query_string;
    fastcgi_param  REQUEST_METHOD     $request_method;
    fastcgi_param  CONTENT_TYPE       $content_type;
    fastcgi_param  CONTENT_LENGTH     $content_length;
    fastcgi_pass_header Authorization;
    fastcgi_intercept_errors off;

    fastcgi_param  SCRIPT_NAME        $fastcgi_script_name;
    fastcgi_param  SCRIPT_FILENAME    $document_root$fastcgi_script_name;
    fastcgi_param  REQUEST_URI        $request_uri;
    fastcgi_param  DOCUMENT_URI       $document_uri;
    fastcgi_param  DOCUMENT_ROOT      $document_root;
    fastcgi_param  SERVER_PROTOCOL    $server_protocol;

    fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;
    fastcgi_param  SERVER_SOFTWARE    nginx;

    fastcgi_param  REMOTE_ADDR    $remote_addr;
    fastcgi_param  REMOTE_PORT    $remote_port;
    fastcgi_param  SERVER_ADDR    $server_addr;
    fastcgi_param  SERVER_PORT    $server_port;
    fastcgi_param  SERVER_NAME    $server_name;

    fastcgi_param  HTTPS    $php_https;

    fastcgi_pass unix:/var/run/php-fcgi.sock;
}

php_https

map $scheme $php_https { https on; http off; }

include php_https in nginx.conf or somewhere in http section
include php in server config in server section