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<?php class MyObjectStorage extends SplObjectStorage { public function contains(object $o): bool { if ($o instanceof stdClass) { return true; } else { return false; } } } $std = new stdClass(); $storage = new MyObjectStorage(); var_dump($storage->contains($std)); var_dump(isset($storage[$std]));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/l913b
function name:  (null)
number of ops:  17
compiled vars:  !0 = $std, !1 = $storage
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   13     0  E >   NEW                                                  $2      'stdClass'
          1        DO_FCALL                                          0          
          2        ASSIGN                                                       !0, $2
   14     3        NEW                                                  $5      'MyObjectStorage'
          4        DO_FCALL                                          0          
          5        ASSIGN                                                       !1, $5
   16     6        INIT_FCALL                                                   'var_dump'
          7        INIT_METHOD_CALL                                             !1, 'contains'
          8        SEND_VAR_EX                                                  !0
          9        DO_FCALL                                          0  $8      
         10        SEND_VAR                                                     $8
         11        DO_ICALL                                                     
   17    12        INIT_FCALL                                                   'var_dump'
         13        ISSET_ISEMPTY_DIM_OBJ                             0  ~10     !1, !0
         14        SEND_VAL                                                     ~10
         15        DO_ICALL                                                     
         16      > RETURN                                                       1

Class MyObjectStorage:
Function contains:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 3, Position 2 = 5
Branch analysis from position: 3
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 5
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/l913b
function name:  contains
number of ops:  8
compiled vars:  !0 = $o
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    4     0  E >   RECV                                                 !0      
    5     1        INSTANCEOF                                                   !0, 'stdClass'
          2      > JMPZ                                                         ~1, ->5
    6     3    > > RETURN                                                       <true>
    5     4*       JMP                                                          ->6
    8     5    > > RETURN                                                       <false>
   10     6*       VERIFY_RETURN_TYPE                                           
          7*     > RETURN                                                       null

End of function contains

End of class MyObjectStorage.

Generated using Vulcan Logic Dumper, using php 8.5.0


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