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<?php $arr = array(); function out(&$o) { $o = 1; } array_walk_recursive($arr, 'out');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/oGHtq
function name:  (null)
number of ops:  6
compiled vars:  !0 = $arr
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    7     1        INIT_FCALL                                               'array_walk_recursive'
          2        SEND_REF                                                 !0
          3        SEND_VAL                                                 'out'
          4        DO_ICALL                                                 
          5      > RETURN                                                   1

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

End of function out

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