Went to update an image gallery with some new pictures. I wrote the gallery generating code four years ago, but the version of PHP on the server has been updated and one of the libraries I use evidently relies on deprecated syntax ($string{$char_index} for the curious, which now would be $string[$char_index]). So I tried to check out the repo from GitHub, only to find they’ve updated their SSH host keys, so I need to fix that before I can fix the code problem. So I tried to update that, but had packed my Yubikey off in a drawer in the office…