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<?php $strings = [ "quanity*price/2+tax", "quanity*price/2" ]; foreach ($strings as $string) { $keywords = preg_split("~[-*/+\d]+~", $string, -1, PREG_SPLIT_NO_EMPTY); print_r($keywords); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 14
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 14
Branch analysis from position: 3
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 14
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 14
filename:       /in/As7Wi
function name:  (null)
number of ops:  16
compiled vars:  !0 = $strings, !1 = $string, !2 = $keywords
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
    8     1      > FE_RESET_R                                           $4      !0, ->14
          2    > > FE_FETCH_R                                                   $4, !1, ->14
    9     3    >   INIT_FCALL                                                   'preg_split'
          4        SEND_VAL                                                     '%7E%5B-%2A%2F%2B%5Cd%5D%2B%7E'
          5        SEND_VAR                                                     !1
          6        SEND_VAL                                                     -1
          7        SEND_VAL                                                     1
          8        DO_ICALL                                             $5      
          9        ASSIGN                                                       !2, $5
   10    10        INIT_FCALL                                                   'print_r'
         11        SEND_VAR                                                     !2
         12        DO_ICALL                                                     
    8    13      > JMP                                                          ->2
         14    >   FE_FREE                                                      $4
   11    15      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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