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<?php $i = 1; $i = $i++ + ++$i; var_dump($i); $i = 1; $i = ++$i + $i++; var_dump($i);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/QbIsZ
function name:  (null)
number of ops:  17
compiled vars:  !0 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 1
    4     1        POST_INC                                         ~2      !0
          2        PRE_INC                                          ~3      !0
          3        ADD                                              ~4      ~2, ~3
          4        ASSIGN                                                   !0, ~4
    5     5        INIT_FCALL                                               'var_dump'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                                 
    7     8        ASSIGN                                                   !0, 1
    8     9        PRE_INC                                          ~8      !0
         10        POST_INC                                         ~9      !0
         11        ADD                                              ~10     ~8, ~9
         12        ASSIGN                                                   !0, ~10
    9    13        INIT_FCALL                                               'var_dump'
         14        SEND_VAR                                                 !0
         15        DO_ICALL                                                 
         16      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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