3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { public function isFoo() { var_dump(isset($this)); return $this instanceof Foo; } } class Bar { public function doSomething() { return Foo::isFoo(); } } $b = new Bar; var_dump($b->doSomething()); // bool(false)
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GaqCS
function name:  (null)
number of ops:  9
compiled vars:  !0 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   15     0  E >   NEW                                              $1      'Bar'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
   16     3        INIT_FCALL                                               'var_dump'
          4        INIT_METHOD_CALL                                         !0, 'doSomething'
          5        DO_FCALL                                      0  $4      
          6        SEND_VAR                                                 $4
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Class Foo:
Function isfoo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GaqCS
function name:  isFoo
number of ops:  8
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   INIT_FCALL                                               'var_dump'
          1        ISSET_ISEMPTY_THIS                               ~0      
          2        SEND_VAL                                                 ~0
          3        DO_ICALL                                                 
    6     4        FETCH_THIS                                       ~2      
          5        INSTANCEOF                                       ~3      ~2, 'Foo'
          6      > RETURN                                                   ~3
    7     7*     > RETURN                                                   null

End of function isfoo

End of class Foo.

Class Bar:
Function dosomething:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GaqCS
function name:  doSomething
number of ops:  4
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   12     0  E >   INIT_STATIC_METHOD_CALL                                  'Foo', 'isFoo'
          1        DO_FCALL                                      0  $0      
          2      > RETURN                                                   $0
   13     3*     > RETURN                                                   null

End of function dosomething

End of class Bar.

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
172.45 ms | 1395 KiB | 15 Q