PHP-FPM missing some commands

Hello everyone, i have a vps with cpanel, nginx, easyapache, multiphp i active shell_exec and exec with this: but now i cannot access to some command such python36, pip3 ,... my user in wheel group when i run ls /usr/bin"); ?> i got: ... python python2 python2.7 ranlib ... but when i run this command in the terminal or php -a i got: ... python python2 python2.7 python2.7-config python2-config python36 python3.6 ... result for /usr/bin/python36"); ?> no such file or directory. my question is: how i can access to missed commands? tnx a lot