def wordpress_passwd(password, salt, count, prefix, uppercase=False):
    """
    Reference(s):
        http://packetstormsecurity.org/files/74448/phpassbrute.py.txt
        http://scriptserver.mainframe8.com/wordpress_password_hasher.php

    >>> wordpress_passwd(password='testpass', salt='aD9ZLmkp', count=2048, prefix='$P$9aD9ZLmkp', uppercase=False)
    '$P$9aD9ZLmkpsN4A83G8MefaaP888gVKX0'
    """

    def _encode64(input_, count):
        output = ''
        i = 0

        while i < count:
            value = ord(input_[i])
            i += 1
            output = output + ITOA64[value & 0x3f]

            if i < count:
                value = value | (ord(input_[i]) << 8)

            output = output + ITOA64[(value >> 6) & 0x3f]

            i += 1
            if i >= count:
                break

            if i < count:
                value = value | (ord(input_[i]) << 16)

            output = output + ITOA64[(value >> 12) & 0x3f]

            i += 1
            if i >= count:
                break

            output = output + ITOA64[(value >> 18) & 0x3f]

        return output

    if isinstance(password, unicode):
        password = password.encode(UNICODE_ENCODING)

    cipher = md5(salt)
    cipher.update(password)
    hash_ = cipher.digest()

    for i in xrange(count):
        _ = md5(hash_)
        _.update(password)
        hash_ = _.digest()

    retVal = prefix + _encode64(hash_, 16)

    return retVal.upper() if uppercase else retVal