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<?php class A { public function work(B $b = null) { } } class B { } $a = new A; $a->work(null);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/WOeXj
function name:  (null)
number of ops:  7
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   23     0  E >   NEW                                              $1      'A'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
   25     3        INIT_METHOD_CALL                                         !0, 'work'
          4        SEND_VAL_EX                                              null
          5        DO_FCALL                                      0          
          6      > RETURN                                                   1

Class A:
Function work:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/WOeXj
function name:  work
number of ops:  2
compiled vars:  !0 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   RECV_INIT                                        !0      null
   10     1      > RETURN                                                   null

End of function work

End of class A.

Class B: [no user functions]

Generated using Vulcan Logic Dumper, using php 8.0.0


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