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<?php $a = (object) array(); $a->a = $a; echo $a == $a;
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/8X2fS
function name:  (null)
number of ops:  7
compiled vars:  !0 = $a
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   CAST                                          8  ~1      <array>
         1        ASSIGN                                                   !0, ~1
   5     2        ASSIGN_OBJ                                               !0, 'a'
         3        OP_DATA                                                  !0
   7     4        IS_EQUAL                                         ~4      !0, !0
         5        ECHO                                                     ~4
         6      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.1.0