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<?php interface I {} class A implements I {} class B extends A {} var_dump(is_subclass_of('A', 'I')); var_dump(is_subclass_of('B', 'I')); var_dump(is_subclass_of('B', 'A'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/OYOJY
function name:  (null)
number of ops:  24
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   DECLARE_CLASS                                            'a'
    5     1        DECLARE_CLASS                                            'b', 'a'
    7     2        INIT_FCALL                                               'var_dump'
          3        INIT_FCALL                                               'is_subclass_of'
          4        SEND_VAL                                                 'A'
          5        SEND_VAL                                                 'I'
          6        DO_ICALL                                         $0      
          7        SEND_VAR                                                 $0
          8        DO_ICALL                                                 
    8     9        INIT_FCALL                                               'var_dump'
         10        INIT_FCALL                                               'is_subclass_of'
         11        SEND_VAL                                                 'B'
         12        SEND_VAL                                                 'I'
         13        DO_ICALL                                         $2      
         14        SEND_VAR                                                 $2
         15        DO_ICALL                                                 
    9    16        INIT_FCALL                                               'var_dump'
         17        INIT_FCALL                                               'is_subclass_of'
         18        SEND_VAL                                                 'B'
         19        SEND_VAL                                                 'A'
         20        DO_ICALL                                         $4      
         21        SEND_VAR                                                 $4
         22        DO_ICALL                                                 
         23      > RETURN                                                   1

Class I: [no user functions]
Class A: [no user functions]
Class B: [no user functions]

Generated using Vulcan Logic Dumper, using php 8.0.0


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