将C＃Sha1转换为php

Question

I am trying to convert a c# code to php but since I am from a php background I am unable to find the relevant code. Here is the code.

  static string sha1Hash(string password)
    {
        return string.Join("", SHA1CryptoServiceProvider.Create().ComputeHash(Encoding.UTF8.GetBytes(password)));
    }

I tried use sha1() of php but the output is very different.c