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<?php function createAnonymousClass() { // This value goes away by the time the class would be instantiated a second time $value = []; $class = get_class(new class() { function foo() { // var_dump($^value); } }); unset($value); // $value is gone now return $class; } $class = createAnonymousClass(); var_dump(new $class); // Can't possibly hold a reference to $value var_dump(createAnonymousClass() === createAnonymousClass());
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/2OcmP
function name:  (null)
number of ops:  18
compiled vars:  !0 = $class
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   17     0  E >   INIT_FCALL                                               'createanonymousclass'
          1        DO_FCALL                                      0  $1      
          2        ASSIGN                                                   !0, $1
   18     3        INIT_FCALL                                               'var_dump'
          4        FETCH_CLASS                                   0  $3      !0
          5        NEW                                              $4      $3
          6        DO_FCALL                                      0          
          7        SEND_VAR                                                 $4
          8        DO_ICALL                                                 
   19     9        INIT_FCALL                                               'var_dump'
         10        INIT_FCALL                                               'createanonymousclass'
         11        DO_FCALL                                      0  $7      
         12        INIT_FCALL                                               'createanonymousclass'
         13        DO_FCALL                                      0  $8      
         14        IS_IDENTICAL                                     ~9      $7, $8
         15        SEND_VAL                                                 ~9
         16        DO_ICALL                                                 
         17      > RETURN                                                   1

Function createanonymousclass:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/2OcmP
function name:  createAnonymousClass
number of ops:  9
compiled vars:  !0 = $value, !1 = $class
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   ASSIGN                                                   !0, <array>
    6     1        DECLARE_ANON_CLASS                               <unknown> 
          2        NEW                                              $4      $3
          3        DO_FCALL                                      0          
          4        GET_CLASS                                        ~6      $4
          5        ASSIGN                                                   !1, ~6
   11     6        UNSET_CV                                                 !0
   14     7      > RETURN                                                   !1
   15     8*     > RETURN                                                   null

End of function createanonymousclass

Class class@anonymous:
Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/2OcmP
function name:  foo
number of ops:  1
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    9     0  E > > RETURN                                                   null

End of function foo

End of class class@anonymous.

Generated using Vulcan Logic Dumper, using php 8.0.0


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