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<?php class ClassName { public function foo(): ?self { return new ClassName(); } public function bar(): ?self { return null; } } $instance = new ClassName(); $instance->foo(); $instance->bar();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/WLnQs
function name:  (null)
number of ops:  8
compiled vars:  !0 = $instance
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   16     0  E >   NEW                                              $1      'ClassName'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
   17     3        INIT_METHOD_CALL                                         !0, 'foo'
          4        DO_FCALL                                      0          
   18     5        INIT_METHOD_CALL                                         !0, 'bar'
          6        DO_FCALL                                      0          
          7      > RETURN                                                   1

Class ClassName:
Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/WLnQs
function name:  foo
number of ops:  6
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   NEW                                              $0      'ClassName'
          1        DO_FCALL                                      0          
          2        VERIFY_RETURN_TYPE                                       $0
          3      > RETURN                                                   $0
    8     4*       VERIFY_RETURN_TYPE                                       
          5*     > RETURN                                                   null

End of function foo

Function bar:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/WLnQs
function name:  bar
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   12     0  E > > RETURN                                                   null
   13     1*       VERIFY_RETURN_TYPE                                       
          2*     > RETURN                                                   null

End of function bar

End of class ClassName.

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