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<?php class A {} class B extends A {} var_dump(is_a('A','B')); var_dump(is_a('B','A')); var_dump(is_subclass_of('A','B')); var_dump(is_subclass_of('B','A')); var_dump(is_subclass_of('A','A'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/JZrdW
function name:  (null)
number of ops:  36
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'is_a'
          2        SEND_VAL                                                 'A'
          3        SEND_VAL                                                 'B'
          4        DO_ICALL                                         $0      
          5        SEND_VAR                                                 $0
          6        DO_ICALL                                                 
    6     7        INIT_FCALL                                               'var_dump'
          8        INIT_FCALL                                               'is_a'
          9        SEND_VAL                                                 'B'
         10        SEND_VAL                                                 'A'
         11        DO_ICALL                                         $2      
         12        SEND_VAR                                                 $2
         13        DO_ICALL                                                 
    7    14        INIT_FCALL                                               'var_dump'
         15        INIT_FCALL                                               'is_subclass_of'
         16        SEND_VAL                                                 'A'
         17        SEND_VAL                                                 'B'
         18        DO_ICALL                                         $4      
         19        SEND_VAR                                                 $4
         20        DO_ICALL                                                 
    8    21        INIT_FCALL                                               'var_dump'
         22        INIT_FCALL                                               'is_subclass_of'
         23        SEND_VAL                                                 'B'
         24        SEND_VAL                                                 'A'
         25        DO_ICALL                                         $6      
         26        SEND_VAR                                                 $6
         27        DO_ICALL                                                 
    9    28        INIT_FCALL                                               'var_dump'
         29        INIT_FCALL                                               'is_subclass_of'
         30        SEND_VAL                                                 'A'
         31        SEND_VAL                                                 'A'
         32        DO_ICALL                                         $8      
         33        SEND_VAR                                                 $8
         34        DO_ICALL                                                 
         35      > RETURN                                                   1

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

Generated using Vulcan Logic Dumper, using php 8.0.0


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