3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(); var_dump(isset($a['foo']['bar']['baz'])); var_dump(array_key_exists('baz', $a['foo']['bar']));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/AqeMh
function name:  (null)
number of ops:  14
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1        INIT_FCALL                                               'var_dump'
          2        FETCH_DIM_IS                                     ~2      !0, 'foo'
          3        FETCH_DIM_IS                                     ~3      ~2, 'bar'
          4        ISSET_ISEMPTY_DIM_OBJ                         0  ~4      ~3, 'baz'
          5        SEND_VAL                                                 ~4
          6        DO_ICALL                                                 
    6     7        INIT_FCALL                                               'var_dump'
          8        FETCH_DIM_R                                      ~6      !0, 'foo'
          9        FETCH_DIM_R                                      ~7      ~6, 'bar'
         10        ARRAY_KEY_EXISTS                                 ~8      'baz', ~7
         11        SEND_VAL                                                 ~8
         12        DO_ICALL                                                 
         13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
147.19 ms | 1394 KiB | 15 Q