3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump((string)null, (string)false, @(string)[], (string)@$_SERVER['shit']);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/0pBRv
function name:  (null)
number of ops:  17
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
          1        CAST                                          6  ~0      null
          2        SEND_VAL                                                 ~0
          3        CAST                                          6  ~1      <false>
          4        SEND_VAL                                                 ~1
          5        BEGIN_SILENCE                                    ~2      
          6        CAST                                          6  ~3      <array>
          7        END_SILENCE                                              ~2
          8        SEND_VAL                                                 ~3
          9        BEGIN_SILENCE                                    ~4      
         10        FETCH_R                      global              ~5      '_SERVER'
         11        FETCH_DIM_R                                      ~6      ~5, 'shit'
         12        END_SILENCE                                              ~4
         13        CAST                                          6  ~7      ~6
         14        SEND_VAL                                                 ~7
         15        DO_ICALL                                                 
         16      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
142.35 ms | 1394 KiB | 15 Q