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<?php declare(strict_types=1); function testParam(?string $arg = null){ var_dump($arg); } testParam(null); testParam("hi"); testParam();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/OlWg5
function name:  (null)
number of ops:  9
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    9     0  E >   INIT_FCALL                                               'testparam'
          1        SEND_VAL                                                 null
          2        DO_FCALL                                      0          
   10     3        INIT_FCALL                                               'testparam'
          4        SEND_VAL                                                 'hi'
          5        DO_FCALL                                      0          
   11     6        INIT_FCALL                                               'testparam'
          7        DO_FCALL                                      0          
          8      > RETURN                                                   1

Function testparam:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/OlWg5
function name:  testParam
number of ops:  5
compiled vars:  !0 = $arg
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   RECV_INIT                                        !0      null
    6     1        INIT_FCALL                                               'var_dump'
          2        SEND_VAR                                                 !0
          3        DO_ICALL                                                 
    7     4      > RETURN                                                   null

End of function testparam

Generated using Vulcan Logic Dumper, using php 8.0.0


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