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123<?php class A {} class B extends A{} class C extends B{} $b = 'B'; var_dump(is_subclass_of('A', 'A'), is_subclass_of('B', 'A'), is_subclass_of($b, 'A')); var_dump(is_a('A', 'A', true), is_a('B', 'A', true), is_a($b, 'A', true)); $className = 'C'; while($_parentClass = get_parent_class($className)) $parentClass = $_parentClass; var_dump($className, $parentClass);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 42
Branch analysis from position: 42
2 jumps found. (Code = 44) Position 1 = 47, Position 2 = 41
Branch analysis from position: 47
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 41
2 jumps found. (Code = 44) Position 1 = 47, Position 2 = 41
Branch analysis from position: 47
Branch analysis from position: 41
filename:       /in/kFUGJ
function name:  (null)
number of ops:  52
compiled vars:  !0 = $b, !1 = $className, !2 = $parentClass, !3 = $_parentClass
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    1     0  E >   ECHO                                                     '123'
    7     1        ASSIGN                                                   !0, 'B'
    8     2        INIT_FCALL                                               'var_dump'
          3        INIT_FCALL                                               'is_subclass_of'
          4        SEND_VAL                                                 'A'
          5        SEND_VAL                                                 'A'
          6        DO_ICALL                                         $5      
          7        SEND_VAR                                                 $5
          8        INIT_FCALL                                               'is_subclass_of'
          9        SEND_VAL                                                 'B'
         10        SEND_VAL                                                 'A'
         11        DO_ICALL                                         $6      
         12        SEND_VAR                                                 $6
         13        INIT_FCALL                                               'is_subclass_of'
         14        SEND_VAR                                                 !0
         15        SEND_VAL                                                 'A'
         16        DO_ICALL                                         $7      
         17        SEND_VAR                                                 $7
         18        DO_ICALL                                                 
    9    19        INIT_FCALL                                               'var_dump'
         20        INIT_FCALL                                               'is_a'
         21        SEND_VAL                                                 'A'
         22        SEND_VAL                                                 'A'
         23        SEND_VAL                                                 <true>
         24        DO_ICALL                                         $9      
         25        SEND_VAR                                                 $9
         26        INIT_FCALL                                               'is_a'
         27        SEND_VAL                                                 'B'
         28        SEND_VAL                                                 'A'
         29        SEND_VAL                                                 <true>
         30        DO_ICALL                                         $10     
         31        SEND_VAR                                                 $10
         32        INIT_FCALL                                               'is_a'
         33        SEND_VAR                                                 !0
         34        SEND_VAL                                                 'A'
         35        SEND_VAL                                                 <true>
         36        DO_ICALL                                         $11     
         37        SEND_VAR                                                 $11
         38        DO_ICALL                                                 
   11    39        ASSIGN                                                   !1, 'C'
   13    40      > JMP                                                      ->42
   14    41    >   ASSIGN                                                   !2, !3
   13    42    >   INIT_FCALL                                               'get_parent_class'
         43        SEND_VAR                                                 !1
         44        DO_ICALL                                         $15     
         45        ASSIGN                                           ~16     !3, $15
         46      > JMPNZ                                                    ~16, ->41
   16    47    >   INIT_FCALL                                               'var_dump'
         48        SEND_VAR                                                 !1
         49        SEND_VAR                                                 !2
         50        DO_ICALL                                                 
         51      > RETURN                                                   1

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

Generated using Vulcan Logic Dumper, using php 8.0.0


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