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<?php $array = []; $array["a"] =& $array["b"]; $array["b"] = 1; var_dump($array);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/frbUc
function name:  (null)
number of ops:  11
compiled vars:  !0 = $array
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
    4     1        FETCH_DIM_W                                          $3      !0, 'b'
          2        MAKE_REF                                             $4      $3
          3        FETCH_DIM_W                                          $2      !0, 'a'
          4        ASSIGN_REF                                                   $2, $4
    5     5        ASSIGN_DIM                                                   !0, 'b'
          6        OP_DATA                                                      1
    6     7        INIT_FCALL                                                   'var_dump'
          8        SEND_VAR                                                     !0
          9        DO_ICALL                                                     
         10      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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