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<?php $class = null; var_dump($class->gggg ?? false);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/hf9dA
function name:  (null)
number of ops:  8
compiled vars:  !0 = $class
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   QM_ASSIGN                                                !0
   5     1        INIT_FCALL                                               'var_dump'
         2        FETCH_OBJ_IS                                     ~2      !0, 'gggg'
         3        COALESCE                                         ~3      ~2
         4        ASSIGN_BW_OR                                  0  ~3      <false>
         5        SEND_VAL                                                 ~3
         6        DO_ICALL                                                 
         7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.4.0