Re: Private Key to WIF?

I'm porting it from https://github.com/bkkcoins/misc/blob/master/hexwif/hexwif

and it's pretty much the exact same code, isn't it?

Note the last line of the code at that link:

Code:

print alphabet[bn] + out

alphabet[bn] in that code is equivalent to the $alphabet[gmp_strval($divmod[0])] that is missing from your code.