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<?php $obj = new \stdclass(); $obj->attr1 = 1; $obj->attr2 = 2; var_dump(count($obj));
based on g8084
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/hOJPT
function name:  (null)
number of ops:  12
compiled vars:  !0 = $obj
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   NEW                                              $1      :-5
         1        DO_FCALL                                      0          
         2        ASSIGN                                                   !0, $1
   4     3        ASSIGN_OBJ                                               !0, 'attr1'
         4        OP_DATA                                                  1
   5     5        ASSIGN_OBJ                                               !0, 'attr2'
         6        OP_DATA                                                  2
   7     7        INIT_FCALL                                               'var_dump'
         8        COUNT                                            ~6      !0
         9        SEND_VAL                                                 ~6
        10        DO_ICALL                                                 
        11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0