How to execute a Python script from PHP that writes to system files?

Question

PHP

Good afternoon, dear colleagues.

I'm trying to make a page for changing network settings on RaspberryPI.
Created a script that writes settings to the dhcpcd.conf configuration:

if len (sys.argv) == 2:
    with open('/etc/dhcpcd.conf', 'a') as file:
        file.write(sys.argv[1])

If you run the script from the terminal, it runs correctly as the pi user.
If you run the script from PHP:

$command = escapeshellcmd('/usr/bin/python3 /var/www/html/assets/modules/test.py 764');
system($command);

then python returns dhcpcd.conf file access error

Answer 1

Use the sudo mechanism. If pi can write to dhcpcd.conf then give www-data permission to run /usr/bin/python3 as user pi without a password.