mikegogulski/bitcoin-php — pull request #8 by justmoon (2012-07-17 12:00:09+00:00)
Title: Check for invalid characters when base58-decoding.

Currently, bitcoin-php considers this address valid: 17FSKMPAyXGR7EQziCqbVfwleGumRosQoh

However, it contains a lowercase l, which is not an allowed character in base58. This patch adds an extra check to prevent this case.