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<?php $matches = []; preg_match('/^(foo)(bar)(baz)?$/', 'foobar', list(&$foo, &$bar, &$baz) = $matches); print_r(get_defined_vars());
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/e0VeT
function name:  (null)
number of ops:  22
compiled vars:  !0 = $matches, !1 = $foo, !2 = $bar, !3 = $baz
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2F%5E%28foo%29%28bar%29%28baz%29%3F%24%2F'
          3        SEND_VAL                                                 'foobar'
          4        MAKE_REF                                         $5      !0
          5        FETCH_LIST_W                                     $6      $5, 0
          6        MAKE_REF                                         $7      $6
          7        ASSIGN_REF                                               !1, $7
          8        FETCH_LIST_W                                     $8      $5, 1
          9        MAKE_REF                                         $9      $8
         10        ASSIGN_REF                                               !2, $9
         11        FETCH_LIST_W                                     $10     $5, 2
         12        MAKE_REF                                         $11     $10
         13        ASSIGN_REF                                               !3, $11
         14        SEND_VAR_NO_REF                               0          $5
         15        DO_ICALL                                                 
    6    16        INIT_FCALL                                               'print_r'
         17        INIT_FCALL                                               'get_defined_vars'
         18        DO_ICALL                                         $13     
         19        SEND_VAR                                                 $13
         20        DO_ICALL                                                 
         21      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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