The upcoming deployment of PHP7, with expected performance gains, provides an impetus to move this codebase forward, and the first problem is a straight incompatibility in connecting to MySQL; my code uses the old mysql_* functions, while PHP7 has removed these and requires the use of the somewhat equivalent mysqli_* functions. Today I worked through the Potluck application to make all the necessary changes for testing purposes. It's not a straight search-and-replace; some equivalently-named functions seem to have their parameters reversed. It's working (although not solidly tested); I haven't migrated the changes to svn yet because I need to do more testing to make sure the results work both on PHP5 and PHP7.