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<?php $array = ['a', 'b']; $result = []; foreach ($array as $k => $result["prefix_$k"]); var_export($result); $result = []; echo "\n---\n"; foreach ($array as $result["prefix_$v"] => $v); var_export($result);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 10
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 10
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 10
2 jumps found. (Code = 77) Position 1 = 17, Position 2 = 23
Branch analysis from position: 17
2 jumps found. (Code = 78) Position 1 = 18, Position 2 = 23
Branch analysis from position: 18
1 jumps found. (Code = 42) Position 1 = 17
Branch analysis from position: 17
Branch analysis from position: 23
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 23
Branch analysis from position: 10
filename:       /in/iVm1u
function name:  (null)
number of ops:  28
compiled vars:  !0 = $array, !1 = $result, !2 = $k, !3 = $v
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1        ASSIGN                                                   !1, <array>
    6     2      > FE_RESET_R                                       $6      !0, ->10
          3    > > FE_FETCH_R                                       ~10     $6, $7, ->10
          4    >   NOP                                                      
          5        FAST_CONCAT                                      ~8      'prefix_', !2
          6        ASSIGN_DIM                                               !1, ~8
          7        OP_DATA                                                  $7
          8        ASSIGN                                                   !2, ~10
          9      > JMP                                                      ->3
         10    >   FE_FREE                                                  $6
    7    11        INIT_FCALL                                               'var_export'
         12        SEND_VAR                                                 !1
         13        DO_ICALL                                                 
    9    14        ASSIGN                                                   !1, <array>
   10    15        ECHO                                                     '%0A---%0A'
   11    16      > FE_RESET_R                                       $14     !0, ->23
         17    > > FE_FETCH_R                                       ~15     $14, !3, ->23
         18    >   NOP                                                      
         19        FAST_CONCAT                                      ~16     'prefix_', !3
         20        ASSIGN_DIM                                               !1, ~16
         21        OP_DATA                                                  ~15
         22      > JMP                                                      ->17
         23    >   FE_FREE                                                  $14
   12    24        INIT_FCALL                                               'var_export'
         25        SEND_VAR                                                 !1
         26        DO_ICALL                                                 
         27      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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151.17 ms | 1003 KiB | 14 Q