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<?php function bar(string $foo = null): string { return $foo; } bar(null);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/3CrX5
function name:  (null)
number of ops:  4
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E >   INIT_FCALL                                               'bar'
          1        SEND_VAL                                                 null
          2        DO_FCALL                                      0          
          3      > RETURN                                                   1

Function bar:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/3CrX5
function name:  bar
number of ops:  5
compiled vars:  !0 = $foo
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV_INIT                                        !0      null
          1        VERIFY_RETURN_TYPE                                       !0
          2      > RETURN                                                   !0
          3*       VERIFY_RETURN_TYPE                                       
          4*     > RETURN                                                   null

End of function bar

Generated using Vulcan Logic Dumper, using php 8.0.0


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