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<?php preg_match_all("/(\d+)|\(([^\(]+)\)/","2(3,4)(5,6,7,8,9)",$matches); print_r($matches[1]);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/hYH06
function name:  (null)
number of ops:  10
compiled vars:  !0 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'preg_match_all'
          1        SEND_VAL                                                 '%2F%28%5Cd%2B%29%7C%5C%28%28%5B%5E%5C%28%5D%2B%29%5C%29%2F'
          2        SEND_VAL                                                 '2%283%2C4%29%285%2C6%2C7%2C8%2C9%29'
          3        SEND_REF                                                 !0
          4        DO_ICALL                                                 
    4     5        INIT_FCALL                                               'print_r'
          6        FETCH_DIM_R                                      ~2      !0, 1
          7        SEND_VAL                                                 ~2
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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