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<?php $i = 0; $foo = "bar"; ${$foo.$i} = "hello"; var_dump($bar0);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lkfND
function name:  (null)
number of ops:  9
compiled vars:  !0 = $i, !1 = $foo, !2 = $bar0
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 0
    4     1        ASSIGN                                                   !1, 'bar'
    6     2        CONCAT                                           ~5      !1, !0
          3        FETCH_W                      local               $6      ~5
          4        ASSIGN                                                   $6, 'hello'
    7     5        INIT_FCALL                                               'var_dump'
          6        SEND_VAR                                                 !2
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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