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<?php function f($a = null, $b) { var_dump(['a' => $a, 'b' => $b]); } f('1', 'test');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/A4iS6
function name:  (null)
number of ops:  5
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E >   INIT_FCALL                                               'f'
          1        SEND_VAL                                                 '1'
          2        SEND_VAL                                                 'test'
          3        DO_FCALL                                      0          
          4      > RETURN                                                   1

Function f:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/A4iS6
function name:  f
number of ops:  8
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV_INIT                                        !0      null
          1        RECV                                             !1      
    5     2        INIT_FCALL                                               'var_dump'
          3        INIT_ARRAY                                       ~2      !0, 'a'
          4        ADD_ARRAY_ELEMENT                                ~2      !1, 'b'
          5        SEND_VAL                                                 ~2
          6        DO_ICALL                                                 
    6     7      > RETURN                                                   null

End of function f

Generated using Vulcan Logic Dumper, using php 8.0.0


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