3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var_3 = "var_4"; $var_2 = "var_3"; $var_1 = "var_2"; echo $var_1."\n"; echo $$var_2."\n"; echo $$$var_3."\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gWAAc
function name:  (null)
number of ops:  13
compiled vars:  !0 = $var_3, !1 = $var_2, !2 = $var_1
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'var_4'
    3     1        ASSIGN                                                   !1, 'var_3'
    4     2        ASSIGN                                                   !2, 'var_2'
    6     3        CONCAT                                           ~6      !2, '%0A'
          4        ECHO                                                     ~6
    7     5        FETCH_R                      local               ~7      !1
          6        CONCAT                                           ~8      ~7, '%0A'
          7        ECHO                                                     ~8
    8     8        FETCH_R                      local               ~9      !0
          9        FETCH_R                      local               ~10     ~9
         10        CONCAT                                           ~11     ~10, '%0A'
         11        ECHO                                                     ~11
         12      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
157.17 ms | 1393 KiB | 13 Q