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<?php interface Foo {} class Bar implements Foo {} $bar = new Bar(); var_dump(is_a($bar, 'Foo')); var_dump(is_a($bar, 'Bar'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/D5vVV
function name:  (null)
number of ops:  19
compiled vars:  !0 = $bar
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   DECLARE_CLASS                                            'bar'
    6     1        NEW                                              $1      'Bar'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $1
    7     4        INIT_FCALL                                               'var_dump'
          5        INIT_FCALL                                               'is_a'
          6        SEND_VAR                                                 !0
          7        SEND_VAL                                                 'Foo'
          8        DO_ICALL                                         $4      
          9        SEND_VAR                                                 $4
         10        DO_ICALL                                                 
    9    11        INIT_FCALL                                               'var_dump'
         12        INIT_FCALL                                               'is_a'
         13        SEND_VAR                                                 !0
         14        SEND_VAL                                                 'Bar'
         15        DO_ICALL                                         $6      
         16        SEND_VAR                                                 $6
         17        DO_ICALL                                                 
         18      > RETURN                                                   1

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

Generated using Vulcan Logic Dumper, using php 8.0.0


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