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run code in 300+ PHP versions simultaneously
<?php list(list($a, $b), list($c, $d)) = $x; // PHP5: $a = $x[0][0]; $b = $x[0][1]; $c = $x[1][0]; $d = $x[1][1]; // PHP7 (assuming nothing is a string): $_tmp1 = $x[0]; $a = $_tmp1[0]; $b = $_tmp1[1]; $_tmp2 = $x[1]; $c = $_tmp2[0]; $d = $_tmp2[1];
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/8JgBJ
function name:  (null)
number of ops:  39
compiled vars:  !0 = $x, !1 = $a, !2 = $b, !3 = $c, !4 = $d, !5 = $_tmp1, !6 = $_tmp2
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   QM_ASSIGN                                        ~7      !0
          1        FETCH_LIST_R                                     $8      ~7, 0
          2        FETCH_LIST_R                                     $9      $8, 0
          3        ASSIGN                                                   !1, $9
          4        FETCH_LIST_R                                     $11     $8, 1
          5        ASSIGN                                                   !2, $11
          6        FREE                                                     $8
          7        FETCH_LIST_R                                     $13     ~7, 1
          8        FETCH_LIST_R                                     $14     $13, 0
          9        ASSIGN                                                   !3, $14
         10        FETCH_LIST_R                                     $16     $13, 1
         11        ASSIGN                                                   !4, $16
         12        FREE                                                     $13
         13        FREE                                                     ~7
    6    14        FETCH_DIM_R                                      ~18     !0, 0
         15        FETCH_DIM_R                                      ~19     ~18, 0
         16        ASSIGN                                                   !1, ~19
    7    17        FETCH_DIM_R                                      ~21     !0, 0
         18        FETCH_DIM_R                                      ~22     ~21, 1
         19        ASSIGN                                                   !2, ~22
    8    20        FETCH_DIM_R                                      ~24     !0, 1
         21        FETCH_DIM_R                                      ~25     ~24, 0
         22        ASSIGN                                                   !3, ~25
    9    23        FETCH_DIM_R                                      ~27     !0, 1
         24        FETCH_DIM_R                                      ~28     ~27, 1
         25        ASSIGN                                                   !4, ~28
   12    26        FETCH_DIM_R                                      ~30     !0, 0
         27        ASSIGN                                                   !5, ~30
   13    28        FETCH_DIM_R                                      ~32     !5, 0
         29        ASSIGN                                                   !1, ~32
   14    30        FETCH_DIM_R                                      ~34     !5, 1
         31        ASSIGN                                                   !2, ~34
   15    32        FETCH_DIM_R                                      ~36     !0, 1
         33        ASSIGN                                                   !6, ~36
   16    34        FETCH_DIM_R                                      ~38     !6, 0
         35        ASSIGN                                                   !3, ~38
   17    36        FETCH_DIM_R                                      ~40     !6, 1
         37        ASSIGN                                                   !4, ~40
         38      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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