3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = "hello"; $$a = "world"; $$$a = "you guys"; echo $$world;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Gddkj
function name:  (null)
number of ops:  9
compiled vars:  !0 = $a, !1 = $world
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'hello'
    3     1        FETCH_W                      local               $3      !0
          2        ASSIGN                                                   $3, 'world'
    4     3        FETCH_R                      local               ~5      !0
          4        FETCH_W                      local               $6      ~5
          5        ASSIGN                                                   $6, 'you+guys'
    5     6        FETCH_R                      local               ~8      !1
          7        ECHO                                                     ~8
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
149.62 ms | 1384 KiB | 13 Q