3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface Foo {} class Bar {} $bar = new Bar(); var_dump(is_subclass_of($bar, 'Foo'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/E7RRT
function name:  (null)
number of ops:  11
compiled vars:  !0 = $bar
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E >   NEW                                              $1      'Bar'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
    7     3        INIT_FCALL                                               'var_dump'
          4        INIT_FCALL                                               'is_subclass_of'
          5        SEND_VAR                                                 !0
          6        SEND_VAL                                                 'Foo'
          7        DO_ICALL                                         $4      
          8        SEND_VAR                                                 $4
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Class Foo: [no user functions]
Class Bar: [no user functions]

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
147.21 ms | 1394 KiB | 17 Q