Lighttpd error emoncms - emon_session_start()

for the heck – trying to install emoncms on openwrt - php7 ,mod_mysqli mod_fastcgi , I’ve seen it before But I do not remember the issue

Fatal error: Uncaught Error: Call to undefined function session_start() in /www3/emon/Modules/user/user_model.php:101 Stack trace: #0 /www3/emon/index.php(116): User->emon_session_start() #1 {main} thrown in /www3/emon/Modules/user/user_model.php on line 101

thank you for your time

I’ve done it recently but used a Lighttpd/PHP7/MariaDB stack installed by/on DietPi. Only addition (assuming you follow the usual install instructions) was this Emoncms and Lighttpd? - #4 by borpin.

openwrt is a bit limited on software choice…it does not have mod_mysql but mod_mysqli

also does not have redis-server php-redis( currently but you can install it third party) build-essential ufw or php-pear

I think pear is my issue, but I thought it was part for email and optional like redis