3v4l.org

run code in 300+ PHP versions simultaneously
<?php $i = 1; $i = $i++ + ++$i; var_dump($i); $i = 1; $i = ++$i + $i++; var_dump($i); $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/oj0QQ
function name:  (null)
number of ops:  33
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                                                 
   11    16        ASSIGN                                                   !0, 1
   12    17        PRE_INC                                          ~14     !0
         18        PRE_INC                                          ~15     !0
         19        ADD                                              ~16     ~14, ~15
         20        ASSIGN                                                   !0, ~16
   13    21        INIT_FCALL                                               'var_dump'
         22        SEND_VAR                                                 !0
         23        DO_ICALL                                                 
   15    24        ASSIGN                                                   !0, 1
   16    25        POST_INC                                         ~20     !0
         26        POST_INC                                         ~21     !0
         27        ADD                                              ~22     ~20, ~21
         28        ASSIGN                                                   !0, ~22
   17    29        INIT_FCALL                                               'var_dump'
         30        SEND_VAR                                                 !0
         31        DO_ICALL                                                 
         32      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
165.99 ms | 1387 KiB | 15 Q