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<?php $numbers = [1, 2, 3, 4, 5, 6, 7, 11, 21, 22, 23, 24]; $prev = -1; foreach ($numbers as $n) { if (!isset($start)) { $start = $n; } elseif ($n != $prev + 1) { $result[] = $start == $prev ? $prev : "$start-$prev"; $start = $n; } $prev = $n; } $result[] = $start == $prev ? $prev : $start . '-' . $prev; echo implode(', ', $result);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 25
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 25
Branch analysis from position: 4
2 jumps found. (Code = 43) Position 1 = 7, Position 2 = 9
Branch analysis from position: 7
1 jumps found. (Code = 42) Position 1 = 23
Branch analysis from position: 23
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 9
2 jumps found. (Code = 43) Position 1 = 12, Position 2 = 23
Branch analysis from position: 12
2 jumps found. (Code = 43) Position 1 = 14, Position 2 = 16
Branch analysis from position: 14
1 jumps found. (Code = 42) Position 1 = 20
Branch analysis from position: 20
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 16
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 23
Branch analysis from position: 25
2 jumps found. (Code = 43) Position 1 = 28, Position 2 = 30
Branch analysis from position: 28
1 jumps found. (Code = 42) Position 1 = 33
Branch analysis from position: 33
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 30
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 25
filename:       /in/7AOGf
function name:  (null)
number of ops:  41
compiled vars:  !0 = $numbers, !1 = $prev, !2 = $n, !3 = $start, !4 = $result
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    4     1        ASSIGN                                                   !1, -1
    5     2      > FE_RESET_R                                       $7      !0, ->25
          3    > > FE_FETCH_R                                               $7, !2, ->25
    6     4    >   ISSET_ISEMPTY_CV                                 ~8      !3
          5        BOOL_NOT                                         ~9      ~8
          6      > JMPZ                                                     ~9, ->9
    7     7    >   ASSIGN                                                   !3, !2
          8      > JMP                                                      ->23
    8     9    >   ADD                                              ~11     !1, 1
         10        IS_NOT_EQUAL                                             !2, ~11
         11      > JMPZ                                                     ~12, ->23
    9    12    >   IS_EQUAL                                                 !3, !1
         13      > JMPZ                                                     ~14, ->16
         14    >   QM_ASSIGN                                        ~15     !1
         15      > JMP                                                      ->20
         16    >   ROPE_INIT                                     3  ~17     !3
         17        ROPE_ADD                                      1  ~17     ~17, '-'
         18        ROPE_END                                      2  ~16     ~17, !1
         19        QM_ASSIGN                                        ~15     ~16
         20    >   ASSIGN_DIM                                               !4
         21        OP_DATA                                                  ~15
   10    22        ASSIGN                                                   !3, !2
   12    23    >   ASSIGN                                                   !1, !2
    5    24      > JMP                                                      ->3
         25    >   FE_FREE                                                  $7
   14    26        IS_EQUAL                                                 !3, !1
         27      > JMPZ                                                     ~22, ->30
         28    >   QM_ASSIGN                                        ~23     !1
         29      > JMP                                                      ->33
         30    >   CONCAT                                           ~24     !3, '-'
         31        CONCAT                                           ~25     ~24, !1
         32        QM_ASSIGN                                        ~23     ~25
         33    >   ASSIGN_DIM                                               !4
         34        OP_DATA                                                  ~23
   15    35        INIT_FCALL                                               'implode'
         36        SEND_VAL                                                 '%2C+'
         37        SEND_VAR                                                 !4
         38        DO_ICALL                                         $26     
         39        ECHO                                                     $26
         40      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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