Change User Password on a linux system

Hi

Im looking for a secure way to let users change their password on linux system using a php file.

can anyone help me to do this in a secure way?


Thanks.

not sure there is a secure method ? , you could setup another webserver (not apache) with root privileges, or a small socket server in PHP/whatever run as root to parse commands sent from localhost only, you could also play with sudoers file?