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<?php $arr = [ 'A', 'B', 'C', 'D']; foreach ($arr as &$item) { $item = "E"; } var_dump($arr);
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = 2, Position 2 = 5
Branch analysis from position: 2
Jump found. Position 1 = 3, Position 2 = 5
Branch analysis from position: 3
Jump found. Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 5
Jump found. Position 1 = -2
Branch analysis from position: 5
filename:       /in/9CWOr
function name:  (null)
number of ops:  10
compiled vars:  !0 = $arr, !1 = $item
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, <array>
   5     1      > FE_RESET_RW                                      $3      !0, ->5
         2    > > FE_FETCH_RW                                              $3, !1, ->5
   6     3    >   ASSIGN                                                   !1, 'E'
         4      > JMP                                                      ->2
         5    >   FE_FREE                                                  $3
   9     6        INIT_FCALL                                               'var_dump'
         7        SEND_VAR                                                 !0
         8        DO_ICALL                                                 
         9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0