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

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

End of function derp

Generated using Vulcan Logic Dumper, using php 8.0.0


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