3v4l.org

run code in 300+ PHP versions simultaneously
<?php $expected_array_got_string = 'test'; var_dump($expected_array_got_string['blah']); var_dump(isset($expected_array_got_string['blah'])); var_dump(isset($expected_array_got_string['jkjk'][0])); var_dump(isset($expected_array_got_string['jkjk'][0]['test'])); var_dump(isset($expected_array_got_string['jkjk']['test'][1])); var_dump(isset($expected_array_got_string['jkjk']['test'][0]));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/djgWu
function name:  (null)
number of ops:  33
compiled vars:  !0 = $expected_array_got_string
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'test'
    4     1        INIT_FCALL                                               'var_dump'
          2        FETCH_DIM_R                                      ~2      !0, 'blah'
          3        SEND_VAL                                                 ~2
          4        DO_ICALL                                                 
    5     5        INIT_FCALL                                               'var_dump'
          6        ISSET_ISEMPTY_DIM_OBJ                         0  ~4      !0, 'blah'
          7        SEND_VAL                                                 ~4
          8        DO_ICALL                                                 
    6     9        INIT_FCALL                                               'var_dump'
         10        FETCH_DIM_IS                                     ~6      !0, 'jkjk'
         11        ISSET_ISEMPTY_DIM_OBJ                         0  ~7      ~6, 0
         12        SEND_VAL                                                 ~7
         13        DO_ICALL                                                 
    7    14        INIT_FCALL                                               'var_dump'
         15        FETCH_DIM_IS                                     ~9      !0, 'jkjk'
         16        FETCH_DIM_IS                                     ~10     ~9, 0
         17        ISSET_ISEMPTY_DIM_OBJ                         0  ~11     ~10, 'test'
         18        SEND_VAL                                                 ~11
         19        DO_ICALL                                                 
    8    20        INIT_FCALL                                               'var_dump'
         21        FETCH_DIM_IS                                     ~13     !0, 'jkjk'
         22        FETCH_DIM_IS                                     ~14     ~13, 'test'
         23        ISSET_ISEMPTY_DIM_OBJ                         0  ~15     ~14, 1
         24        SEND_VAL                                                 ~15
         25        DO_ICALL                                                 
    9    26        INIT_FCALL                                               'var_dump'
         27        FETCH_DIM_IS                                     ~17     !0, 'jkjk'
         28        FETCH_DIM_IS                                     ~18     ~17, 'test'
         29        ISSET_ISEMPTY_DIM_OBJ                         0  ~19     ~18, 0
         30        SEND_VAL                                                 ~19
         31        DO_ICALL                                                 
         32      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
163.5 ms | 1388 KiB | 15 Q