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<?php $items = [1,2,3]; function foo() { return $items; } foreach(foo() as &$item) { echo $item, PHP_EOL; $item = 5; echo $item, PHP_EOL; } var_dump($items);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 125) Position 1 = 5, Position 2 = 12
Branch analysis from position: 5
2 jumps found. (Code = 126) Position 1 = 6, Position 2 = 12
Branch analysis from position: 6
1 jumps found. (Code = 42) Position 1 = 5
Branch analysis from position: 5
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
filename:       /in/iTuAt
function name:  (null)
number of ops:  17
compiled vars:  !0 = $items, !1 = $item
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    8     1        INIT_FCALL                                               'foo'
          2        DO_FCALL                                      0  $3      
          3        SEPARATE                                         $3      $3
          4      > FE_RESET_RW                                      $4      $3, ->12
          5    > > FE_FETCH_RW                                              $4, !1, ->12
    9     6    >   ECHO                                                     !1
          7        ECHO                                                     '%0A'
   10     8        ASSIGN                                                   !1, 5
   11     9        ECHO                                                     !1
         10        ECHO                                                     '%0A'
    8    11      > JMP                                                      ->5
         12    >   FE_FREE                                                  $4
   14    13        INIT_FCALL                                               'var_dump'
         14        SEND_VAR                                                 !0
         15        DO_ICALL                                                 
         16      > RETURN                                                   1

Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/iTuAt
function name:  foo
number of ops:  2
compiled vars:  !0 = $items
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E > > RETURN                                                   !0
    6     1*     > RETURN                                                   null

End of function foo

Generated using Vulcan Logic Dumper, using php 8.0.0


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