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<?php $a = 'hello'; $$a = 'world'; echo "$a $$a";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Z1U1n
function name:  (null)
number of ops:  8
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'hello'
    3     1        FETCH_W                      local               $2      !0
          2        ASSIGN                                                   $2, 'world'
    5     3        ROPE_INIT                                     3  ~5      !0
          4        ROPE_ADD                                      1  ~5      ~5, '+%24'
          5        ROPE_END                                      2  ~4      ~5, !0
          6        ECHO                                                     ~4
          7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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