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<?php $regex = '/(?:\h*C\h+|\G(?!^))\h*,*\h*\K\d+/i'; $strings = [ "C 1,13,7,2,55", "c 1 , 12,15 , 8 , 9,10,11", "1,2 , 4,5", "d 12456, 9890" ]; foreach ($strings as $s) { if (preg_match_all($regex, $s, $matches)) { print_r($matches[0]); } }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 15
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 15
Branch analysis from position: 4
2 jumps found. (Code = 43) Position 1 = 10, Position 2 = 14
Branch analysis from position: 10
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 14
Branch analysis from position: 15
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 15
filename:       /in/SdCDj
function name:  (null)
number of ops:  17
compiled vars:  !0 = $regex, !1 = $strings, !2 = $s, !3 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%2F%28%3F%3A%5Ch%2AC%5Ch%2B%7C%5CG%28%3F%21%5E%29%29%5Ch%2A%2C%2A%5Ch%2A%5CK%5Cd%2B%2Fi'
    4     1        ASSIGN                                                   !1, <array>
   11     2      > FE_RESET_R                                       $6      !1, ->15
          3    > > FE_FETCH_R                                               $6, !2, ->15
   12     4    >   INIT_FCALL                                               'preg_match_all'
          5        SEND_VAR                                                 !0
          6        SEND_VAR                                                 !2
          7        SEND_REF                                                 !3
          8        DO_ICALL                                         $7      
          9      > JMPZ                                                     $7, ->14
   13    10    >   INIT_FCALL                                               'print_r'
         11        FETCH_DIM_R                                      ~8      !3, 0
         12        SEND_VAL                                                 ~8
         13        DO_ICALL                                                 
   11    14    > > JMP                                                      ->3
         15    >   FE_FREE                                                  $6
   15    16      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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