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<?php $html = <<<HTML <option value="123"></option> <option value="412"></option> HTML; preg_match_all('/value="\K\d+/', $html, $result); var_dump($result[0]);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/XR75H
function name:  (null)
number of ops:  11
compiled vars:  !0 = $html, !1 = $result
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%3Coption+value%3D%22123%22%3E%3C%2Foption%3E%0A%3Coption+value%3D%22412%22%3E%3C%2Foption%3E+'
    8     1        INIT_FCALL                                               'preg_match_all'
          2        SEND_VAL                                                 '%2Fvalue%3D%22%5CK%5Cd%2B%2F'
          3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !1
          5        DO_ICALL                                                 
    9     6        INIT_FCALL                                               'var_dump'
          7        FETCH_DIM_R                                      ~4      !1, 0
          8        SEND_VAL                                                 ~4
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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