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<?php $a = new ArrayObject(); $a[0] = 'pizza'; $a[1] = 'time'; var_dump(is_object($a));
based on VnM3l
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/IdAqn
function name:  (null)
number of ops:  12
compiled vars:  !0 = $a
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   NEW                                              $1      :-6
         1        DO_FCALL                                      0          
         2        ASSIGN                                                   !0, $1
   3     3        ASSIGN_DIM                                               !0, 0
         4        OP_DATA                                                  'pizza'
   4     5        ASSIGN_DIM                                               !0, 1
         6        OP_DATA                                                  'time'
   5     7        INIT_FCALL                                               'var_dump'
         8        TYPE_CHECK                                    8  ~6      !0
         9        SEND_VAL                                                 ~6
        10        DO_ICALL                                                 
        11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.2.0