如何使用php创建unix密码哈希

Question

I'm trying to create system users with a php script securely, In that, I'd like to be able to hash the password with the php script, so that their password shows up nowhere in the bash history.

How to I take a string, and hash it so it is a unix password hash?

$UX_PW = some_function('my_password');
exec("useradd -p $UX_PW newusername");

Answer 1

It's crypt() that implements the UNIX password hashing.
http://us.php.net/manual/en/function.crypt.php