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<?php $result = "How much is 25.5 + 35.5"; $allowed = array('1','2','3','4','5','6','7', '8', '9','0','-','+','/','*','.'); $regex = sprintf('/([%s]+)/u', preg_quote(join($allowed), '/')); preg_match_all($regex, $result, $match); switch($match[0][1]){ case '-': echo $match[0][0] - $match[0][2]; break; case '*': echo $match[0][0] * $match[0][2]; break; case '+': echo $match[0][0] + $match[0][2]; break; case '/': echo $match[0][0] / $match[0][2]; break; }
Finding entry points
Branch analysis from position: 0
6 jumps found. (Code = 188) Position 1 = 31, Position 2 = 38, Position 3 = 45, Position 4 = 52, Position 5 = 59, Position 6 = 22
Branch analysis from position: 31
1 jumps found. (Code = 42) Position 1 = 59
Branch analysis from position: 59
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 38
1 jumps found. (Code = 42) Position 1 = 59
Branch analysis from position: 59
Branch analysis from position: 45
1 jumps found. (Code = 42) Position 1 = 59
Branch analysis from position: 59
Branch analysis from position: 52
1 jumps found. (Code = 42) Position 1 = 59
Branch analysis from position: 59
Branch analysis from position: 59
Branch analysis from position: 22
2 jumps found. (Code = 44) Position 1 = 24, Position 2 = 31
Branch analysis from position: 24
2 jumps found. (Code = 44) Position 1 = 26, Position 2 = 38
Branch analysis from position: 26
2 jumps found. (Code = 44) Position 1 = 28, Position 2 = 45
Branch analysis from position: 28
2 jumps found. (Code = 44) Position 1 = 30, Position 2 = 52
Branch analysis from position: 30
1 jumps found. (Code = 42) Position 1 = 59
Branch analysis from position: 59
Branch analysis from position: 52
Branch analysis from position: 45
Branch analysis from position: 38
Branch analysis from position: 31
filename:       /in/Ug20p
function name:  (null)
number of ops:  61
compiled vars:  !0 = $result, !1 = $allowed, !2 = $regex, !3 = $match
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'How+much+is+25.5+%2B+35.5'
    3     1        ASSIGN                                                   !1, <array>
    4     2        INIT_FCALL                                               'sprintf'
          3        SEND_VAL                                                 '%2F%28%5B%25s%5D%2B%29%2Fu'
          4        INIT_FCALL                                               'preg_quote'
          5        INIT_FCALL                                               'join'
          6        SEND_VAR                                                 !1
          7        DO_ICALL                                         $6      
          8        SEND_VAR                                                 $6
          9        SEND_VAL                                                 '%2F'
         10        DO_ICALL                                         $7      
         11        SEND_VAR                                                 $7
         12        DO_ICALL                                         $8      
         13        ASSIGN                                                   !2, $8
    5    14        INIT_FCALL                                               'preg_match_all'
         15        SEND_VAR                                                 !2
         16        SEND_VAR                                                 !0
         17        SEND_REF                                                 !3
         18        DO_ICALL                                                 
    6    19        FETCH_DIM_R                                      ~11     !3, 0
         20        FETCH_DIM_R                                      ~12     ~11, 1
         21      > SWITCH_STRING                                            ~12, [ '-':->31, '%2A':->38, '%2B':->45, '%2F':->52, ], ->59
    7    22    >   CASE                                                     ~12, '-'
         23      > JMPNZ                                                    ~13, ->31
   10    24    >   CASE                                                     ~12, '%2A'
         25      > JMPNZ                                                    ~13, ->38
   13    26    >   CASE                                                     ~12, '%2B'
         27      > JMPNZ                                                    ~13, ->45
   16    28    >   CASE                                                     ~12, '%2F'
         29      > JMPNZ                                                    ~13, ->52
         30    > > JMP                                                      ->59
    8    31    >   FETCH_DIM_R                                      ~14     !3, 0
         32        FETCH_DIM_R                                      ~15     ~14, 0
         33        FETCH_DIM_R                                      ~16     !3, 0
         34        FETCH_DIM_R                                      ~17     ~16, 2
         35        SUB                                              ~18     ~15, ~17
         36        ECHO                                                     ~18
    9    37      > JMP                                                      ->59
   11    38    >   FETCH_DIM_R                                      ~19     !3, 0
         39        FETCH_DIM_R                                      ~20     ~19, 0
         40        FETCH_DIM_R                                      ~21     !3, 0
         41        FETCH_DIM_R                                      ~22     ~21, 2
         42        MUL                                              ~23     ~20, ~22
         43        ECHO                                                     ~23
   12    44      > JMP                                                      ->59
   14    45    >   FETCH_DIM_R                                      ~24     !3, 0
         46        FETCH_DIM_R                                      ~25     ~24, 0
         47        FETCH_DIM_R                                      ~26     !3, 0
         48        FETCH_DIM_R                                      ~27     ~26, 2
         49        ADD                                              ~28     ~25, ~27
         50        ECHO                                                     ~28
   15    51      > JMP                                                      ->59
   17    52    >   FETCH_DIM_R                                      ~29     !3, 0
         53        FETCH_DIM_R                                      ~30     ~29, 0
         54        FETCH_DIM_R                                      ~31     !3, 0
         55        FETCH_DIM_R                                      ~32     ~31, 2
         56        DIV                                              ~33     ~30, ~32
         57        ECHO                                                     ~33
   18    58      > JMP                                                      ->59
         59    >   FREE                                                     ~12
   19    60      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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150.38 ms | 1010 KiB | 17 Q