3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a=array(1,2,3); $b=&$a; $b=&$b[1]; print_r($b); print_r($a);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/fpKp6
function name:  (null)
number of ops:  11
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    3     1        ASSIGN_REF                                               !1, !0
    4     2        FETCH_DIM_W                                      $4      !1, 1
          3        ASSIGN_REF                                               !1, $4
    5     4        INIT_FCALL                                               'print_r'
          5        SEND_VAR                                                 !1
          6        DO_ICALL                                                 
    6     7        INIT_FCALL                                               'print_r'
          8        SEND_VAR                                                 !0
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
158.97 ms | 1394 KiB | 15 Q