I have an older Debian server and a local install of Wordpress; I'm trying to track down why calling:
on the Debian server results in
"\ud83dde00" but on my local install, calling the same
json_encode line results in
"\ud83d\ude00" (which is what I'd expect to see on the Debian server too)...
Both versions of php are compiled with
mbstring=all enabled, and both use
libmbfl version 1.3.2