Oh the treasure of a client coming to you with a site they have removed the previous dev on... treasure hunt.  Not. Anyway, gaining access to an old site, working through the errors I came across this deprecated code Deprecated function: array_key_exists(): Using array_key_exists() on objects is deprecated. Use isset() or property_exists() instead in common_check_language() (line 306 of /path/to/file).  What has happened and options available array_key_exists() became deprecated in...