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<?php class A{ public function c(?string $a = null) {} } class B extends A{ public function c(string $a = null) {} }
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/W7YWZ
function name:  (null)
number of ops:  1
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    9     0  E > > RETURN                                                       1

Class A:
Function c:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/W7YWZ
function name:  c
number of ops:  2
compiled vars:  !0 = $a
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    4     0  E >   RECV_INIT                                            !0      null
          1      > RETURN                                                       null

End of function c

End of class A.

Class B:
Function c:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/W7YWZ
function name:  c
number of ops:  2
compiled vars:  !0 = $a
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    8     0  E >   RECV_INIT                                            !0      null
          1      > RETURN                                                       null

End of function c

End of class B.

Generated using Vulcan Logic Dumper, using php 8.5.0


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