3v4l.org

run code in 300+ PHP versions simultaneously
<?php class BaseClass { } class MyClass extends BaseClass{ } $object = new MyClass(); echo is_subclass_of('BaseClass', 'BaseClass')? 'Yes<br />':'No<br />'; echo is_subclass_of('MyClass', 'BaseClass')? 'Yes<br />':'No<br />'; echo is_subclass_of('myclass', 'baseclass')? 'Yes<br />':'No<br />'; echo is_subclass_of('myClass', 'baseclass', false)? 'Yes<br />':'No<br />'; echo is_subclass_of($object, 'baseclass', false)? 'Yes<br />':'No<br />'; echo is_subclass_of($object, 'BaseClass')? 'Yes<br />':'No<br />';
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 10
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 11
Branch analysis from position: 11
2 jumps found. (Code = 43) Position 1 = 17, Position 2 = 19
Branch analysis from position: 17
1 jumps found. (Code = 42) Position 1 = 20
Branch analysis from position: 20
2 jumps found. (Code = 43) Position 1 = 26, Position 2 = 28
Branch analysis from position: 26
1 jumps found. (Code = 42) Position 1 = 29
Branch analysis from position: 29
2 jumps found. (Code = 43) Position 1 = 36, Position 2 = 38
Branch analysis from position: 36
1 jumps found. (Code = 42) Position 1 = 39
Branch analysis from position: 39
2 jumps found. (Code = 43) Position 1 = 46, Position 2 = 48
Branch analysis from position: 46
1 jumps found. (Code = 42) Position 1 = 49
Branch analysis from position: 49
2 jumps found. (Code = 43) Position 1 = 55, Position 2 = 57
Branch analysis from position: 55
1 jumps found. (Code = 42) Position 1 = 58
Branch analysis from position: 58
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 57
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 48
2 jumps found. (Code = 43) Position 1 = 55, Position 2 = 57
Branch analysis from position: 55
Branch analysis from position: 57
Branch analysis from position: 38
2 jumps found. (Code = 43) Position 1 = 46, Position 2 = 48
Branch analysis from position: 46
Branch analysis from position: 48
Branch analysis from position: 28
2 jumps found. (Code = 43) Position 1 = 36, Position 2 = 38
Branch analysis from position: 36
Branch analysis from position: 38
Branch analysis from position: 19
2 jumps found. (Code = 43) Position 1 = 26, Position 2 = 28
Branch analysis from position: 26
Branch analysis from position: 28
Branch analysis from position: 10
2 jumps found. (Code = 43) Position 1 = 17, Position 2 = 19
Branch analysis from position: 17
Branch analysis from position: 19
filename:       /in/agQVL
function name:  (null)
number of ops:  60
compiled vars:  !0 = $object
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   NEW                                              $1      'MyClass'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
    8     3        INIT_FCALL                                               'is_subclass_of'
          4        SEND_VAL                                                 'BaseClass'
          5        SEND_VAL                                                 'BaseClass'
          6        DO_ICALL                                         $4      
          7      > JMPZ                                                     $4, ->10
          8    >   QM_ASSIGN                                        ~5      'Yes%3Cbr+%2F%3E'
          9      > JMP                                                      ->11
         10    >   QM_ASSIGN                                        ~5      'No%3Cbr+%2F%3E'
         11    >   ECHO                                                     ~5
    9    12        INIT_FCALL                                               'is_subclass_of'
         13        SEND_VAL                                                 'MyClass'
         14        SEND_VAL                                                 'BaseClass'
         15        DO_ICALL                                         $6      
         16      > JMPZ                                                     $6, ->19
         17    >   QM_ASSIGN                                        ~7      'Yes%3Cbr+%2F%3E'
         18      > JMP                                                      ->20
         19    >   QM_ASSIGN                                        ~7      'No%3Cbr+%2F%3E'
         20    >   ECHO                                                     ~7
   10    21        INIT_FCALL                                               'is_subclass_of'
         22        SEND_VAL                                                 'myclass'
         23        SEND_VAL                                                 'baseclass'
         24        DO_ICALL                                         $8      
         25      > JMPZ                                                     $8, ->28
         26    >   QM_ASSIGN                                        ~9      'Yes%3Cbr+%2F%3E'
         27      > JMP                                                      ->29
         28    >   QM_ASSIGN                                        ~9      'No%3Cbr+%2F%3E'
         29    >   ECHO                                                     ~9
   11    30        INIT_FCALL                                               'is_subclass_of'
         31        SEND_VAL                                                 'myClass'
         32        SEND_VAL                                                 'baseclass'
         33        SEND_VAL                                                 <false>
         34        DO_ICALL                                         $10     
         35      > JMPZ                                                     $10, ->38
         36    >   QM_ASSIGN                                        ~11     'Yes%3Cbr+%2F%3E'
         37      > JMP                                                      ->39
         38    >   QM_ASSIGN                                        ~11     'No%3Cbr+%2F%3E'
         39    >   ECHO                                                     ~11
   12    40        INIT_FCALL                                               'is_subclass_of'
         41        SEND_VAR                                                 !0
         42        SEND_VAL                                                 'baseclass'
         43        SEND_VAL                                                 <false>
         44        DO_ICALL                                         $12     
         45      > JMPZ                                                     $12, ->48
         46    >   QM_ASSIGN                                        ~13     'Yes%3Cbr+%2F%3E'
         47      > JMP                                                      ->49
         48    >   QM_ASSIGN                                        ~13     'No%3Cbr+%2F%3E'
         49    >   ECHO                                                     ~13
   13    50        INIT_FCALL                                               'is_subclass_of'
         51        SEND_VAR                                                 !0
         52        SEND_VAL                                                 'BaseClass'
         53        DO_ICALL                                         $14     
         54      > JMPZ                                                     $14, ->57
         55    >   QM_ASSIGN                                        ~15     'Yes%3Cbr+%2F%3E'
         56      > JMP                                                      ->58
         57    >   QM_ASSIGN                                        ~15     'No%3Cbr+%2F%3E'
         58    >   ECHO                                                     ~15
         59      > RETURN                                                   1

Class BaseClass: [no user functions]
Class MyClass: [no user functions]

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
157.97 ms | 1400 KiB | 15 Q