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

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

End of function foo

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