3v4l.org

run code in 300+ PHP versions simultaneously
<?php $class = 'Test'; echo ${!${''}="$class"};
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/VPhNh
function name:  (null)
number of ops:  7
compiled vars:  !0 = $class, !1 = $
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'Test'
    4     1        CAST                                          6  ~3      !0
          2        ASSIGN                                           ~4      !1, ~3
          3        BOOL_NOT                                         ~5      ~4
          4        FETCH_R                      local               ~6      ~5
          5        ECHO                                                     ~6
          6      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
150.14 ms | 1392 KiB | 13 Q