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<?php class B { public function __toString() { return 'b'; } } class A { function getFoo(): ?string { return new B(); } } $a = new A(); var_dump($a->getFoo());
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CB2r4
function name:  (null)
number of ops:  10
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   DECLARE_CLASS                                            'b'
   18     1        NEW                                              $1      'A'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $1
   19     4        INIT_FCALL                                               'var_dump'
          5        INIT_METHOD_CALL                                         !0, 'getFoo'
          6        DO_FCALL                                      0  $4      
          7        SEND_VAR                                                 $4
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Class B:
Function __tostring:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CB2r4
function name:  __toString
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E > > RETURN                                                   'b'
    8     1*       VERIFY_RETURN_TYPE                                       
          2*     > RETURN                                                   null

End of function __tostring

End of class B.

Class A:
Function getfoo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CB2r4
function name:  getFoo
number of ops:  6
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   14     0  E >   NEW                                              $0      'B'
          1        DO_FCALL                                      0          
          2        VERIFY_RETURN_TYPE                                       $0
          3      > RETURN                                                   $0
   15     4*       VERIFY_RETURN_TYPE                                       
          5*     > RETURN                                                   null

End of function getfoo

End of class A.

Generated using Vulcan Logic Dumper, using php 8.0.0


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