need sysadmin to fix ngix 7 httpd error - 50 euros only

hello ,

i have centos 7 , installed old plesk version and old php5 version

then i want to run php script in my terminal using cmd
php script.php
i got
-bash: php: command not found

then i use yum install php
and that was the big mistake , install php on another php
these changes leads to many problems in my box

please someone can help me using anydesk ?