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<?php function test(int $n = NULL) { var_dump($n); } test(); test(NULL); test(123); test('123');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/9N8lf
function name:  (null)
number of ops:  12
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E >   INIT_FCALL                                               'test'
          1        DO_FCALL                                      0          
    9     2        INIT_FCALL                                               'test'
          3        SEND_VAL                                                 null
          4        DO_FCALL                                      0          
   10     5        INIT_FCALL                                               'test'
          6        SEND_VAL                                                 123
          7        DO_FCALL                                      0          
   11     8        INIT_FCALL                                               'test'
          9        SEND_VAL                                                 '123'
         10        DO_FCALL                                      0          
         11      > RETURN                                                   1

Function test:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/9N8lf
function name:  test
number of ops:  5
compiled vars:  !0 = $n
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV_INIT                                        !0      null
    5     1        INIT_FCALL                                               'var_dump'
          2        SEND_VAR                                                 !0
          3        DO_ICALL                                                 
    6     4      > RETURN                                                   null

End of function test

Generated using Vulcan Logic Dumper, using php 8.0.0


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