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