3v4l.org

run code in 500+ PHP versions simultaneously
<?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 8.5.0


preferences:
155.56 ms | 1439 KiB | 14 Q