3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a['a']['a'] = 1; var_dump(isset($a));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/U9m7I
function name:  (null)
number of ops:  8
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   FETCH_DIM_W                                      $1      !0, 'a'
          1        ASSIGN_DIM                                               $1, 'a'
          2        OP_DATA                                                  1
    3     3        INIT_FCALL                                               'var_dump'
          4        ISSET_ISEMPTY_CV                                 ~3      !0
          5        SEND_VAL                                                 ~3
          6        DO_ICALL                                                 
          7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
150.27 ms | 1394 KiB | 15 Q