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/51pCk
function name:  (null)
number of ops:  15
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        CAST                                          6  ~2      <array>
          6        SEND_VAL                                                 ~2
          7        BEGIN_SILENCE                                    ~3      
          8        FETCH_R                      global              ~4      '_SERVER'
          9        FETCH_DIM_R                                      ~5      ~4, 'shit'
         10        END_SILENCE                                              ~3
         11        CAST                                          6  ~6      ~5
         12        SEND_VAL                                                 ~6
         13        DO_ICALL                                                 
         14      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
166.07 ms | 1394 KiB | 15 Q