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<?php $pattern = '# \w*([0-9]{1}) (\w+)#'; $string = "PHP5 released PHP6 not released"; preg_match_all($pattern, $string, $matches); print_r($matches[1]);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/slKDa
function name:  (null)
number of ops:  12
compiled vars:  !0 = $pattern, !1 = $string, !2 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%23+%5Cw%2A%28%5B0-9%5D%7B1%7D%29+%28%5Cw%2B%29%23'
    4     1        ASSIGN                                                   !1, 'PHP5+released+PHP6+not+released'
    5     2        INIT_FCALL                                               'preg_match_all'
          3        SEND_VAR                                                 !0
          4        SEND_VAR                                                 !1
          5        SEND_REF                                                 !2
          6        DO_ICALL                                                 
    6     7        INIT_FCALL                                               'print_r'
          8        FETCH_DIM_R                                      ~6      !2, 1
          9        SEND_VAL                                                 ~6
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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