I released Xdebug 3.3, and the patch releases 3.3.1 and 3.3.2. Xdebug 3.3 brings a bunch of new features into Xdebug, such as flamegraphs. And it can now also show the contents of ArrayIterator, SplDoublyLinkedList, SplPriorityQueue objects, and information about thrown exceptions. There is currently still an outstanding issue (or more than one), where Xdebug crashes. These allow a client to instruct Xdebug to either initiate a debugging connection, or instigate a breakpoint out of band: i.e., when no debugging session is active.