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

Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lmbDD
function name:  foo
number of ops:  6
compiled vars:  !0 = $foo
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV_VARIADIC                                    !0      
    4     1        INIT_FCALL                                               'var_dump'
          2        IS_IDENTICAL                                     ~1      !0, <array>
          3        SEND_VAL                                                 ~1
          4        DO_ICALL                                                 
    5     5      > RETURN                                                   null

End of function foo

Generated using Vulcan Logic Dumper, using php 8.0.0


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