3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = ['cat', 'dog', 'horse']; $a =& $array[2]; var_dump($array); $a = $array[0]; echo "$a\n"; $a = $array[1]; echo "$a\n"; echo $array[2]; $a = $array[2]; echo "$a\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/aXW0s
function name:  (null)
number of ops:  24
compiled vars:  !0 = $array, !1 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1        FETCH_DIM_W                                      $3      !0, 2
          2        ASSIGN_REF                                               !1, $3
    7     3        INIT_FCALL                                               'var_dump'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                                 
    9     6        FETCH_DIM_R                                      ~6      !0, 0
          7        ASSIGN                                                   !1, ~6
          8        NOP                                                      
          9        FAST_CONCAT                                      ~8      !1, '%0A'
         10        ECHO                                                     ~8
   10    11        FETCH_DIM_R                                      ~9      !0, 1
         12        ASSIGN                                                   !1, ~9
         13        NOP                                                      
         14        FAST_CONCAT                                      ~11     !1, '%0A'
         15        ECHO                                                     ~11
   11    16        FETCH_DIM_R                                      ~12     !0, 2
         17        ECHO                                                     ~12
   12    18        FETCH_DIM_R                                      ~13     !0, 2
         19        ASSIGN                                                   !1, ~13
         20        NOP                                                      
         21        FAST_CONCAT                                      ~15     !1, '%0A'
         22        ECHO                                                     ~15
         23      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
171.68 ms | 1395 KiB | 15 Q