3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a='d'; $b='a'; $c='b'; $d='a'; echo "$a {$$a} $$$a $$$a $$$$a $$$$$a";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ljeJN
function name:  (null)
number of ops:  18
compiled vars:  !0 = $a, !1 = $b, !2 = $c, !3 = $d
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'd'
    3     1        ASSIGN                                                   !1, 'a'
    4     2        ASSIGN                                                   !2, 'b'
    5     3        ASSIGN                                                   !3, 'a'
    7     4        ROPE_INIT                                    11  ~10     !0
          5        ROPE_ADD                                      1  ~10     ~10, '+'
          6        FETCH_R                      local               ~8      !0
          7        ROPE_ADD                                      2  ~10     ~10, ~8
          8        ROPE_ADD                                      3  ~10     ~10, '+%24%24'
          9        ROPE_ADD                                      4  ~10     ~10, !0
         10        ROPE_ADD                                      5  ~10     ~10, '+%24%24'
         11        ROPE_ADD                                      6  ~10     ~10, !0
         12        ROPE_ADD                                      7  ~10     ~10, '+%24%24%24'
         13        ROPE_ADD                                      8  ~10     ~10, !0
         14        ROPE_ADD                                      9  ~10     ~10, '+%24%24%24%24'
         15        ROPE_END                                     10  ~9      ~10, !0
         16        ECHO                                                     ~9
         17      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
151.75 ms | 1393 KiB | 13 Q