Change user password via API

I want to write API function for change user password.
I see php files are encrypted so I do not know how start with it.
Any help ?

I want to write API function for change user password.
I see php files are encrypted so I do not know how start with it.
Any help ?

users password store in /etc/shadow



I think

Yep. So you need to get the plain password, to crypt it the same way CentOS do, replace it in /etc/shadow and reload the password db of CentOS(this is by memory from FreeBSD, may be on Linux you don`t need to reload it after changes).