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<?php class Foo { public function test( self $arg = null ){ echo get_class( $arg ) . "\n"; echo is_null( $arg ) . "\n"; echo $arg instanceof Foo . "\n"; } } $foo = new Foo(); $foo->test();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/NNVAu
function name:  (null)
number of ops:  6
compiled vars:  !0 = $foo
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E >   NEW                                              $1      'Foo'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
   13     3        INIT_METHOD_CALL                                         !0, 'test'
          4        DO_FCALL                                      0          
          5      > RETURN                                                   1

Class Foo:
Function test:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/NNVAu
function name:  test
number of ops:  11
compiled vars:  !0 = $arg
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   RECV_INIT                                        !0      null
    5     1        GET_CLASS                                        ~1      !0
          2        CONCAT                                           ~2      ~1, '%0A'
          3        ECHO                                                     ~2
    6     4        TYPE_CHECK                                    2  ~3      !0
          5        CONCAT                                           ~4      ~3, '%0A'
          6        ECHO                                                     ~4
    7     7        INSTANCEOF                                       ~5      !0, 'Foo'
          8        CONCAT                                           ~6      ~5, '%0A'
          9        ECHO                                                     ~6
    8    10      > RETURN                                                   null

End of function test

End of class Foo.

Generated using Vulcan Logic Dumper, using php 8.0.0


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