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<?php $v = 18; function f( &$p ) { $p = 36; return $p; } echo call_user_func_array(‘f’,array(&$v)); // 36
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/QDRv6
function name:  (null)
number of ops:  9
compiled vars:  !0 = $v
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 18
    7     1        FETCH_CONSTANT                                   ~2      '%E2%80%98f%E2%80%99'
          2        INIT_USER_CALL                                0          'call_user_func_array', ~2
          3        INIT_ARRAY                                       ~3      !0
          4        SEND_ARRAY                                               ~3
          5        CHECK_UNDEF_ARGS                                         
          6        DO_FCALL                                      0  $4      
          7        ECHO                                                     $4
          8      > RETURN                                                   1

Function f:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/QDRv6
function name:  f
number of ops:  4
compiled vars:  !0 = $p
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    4     1        ASSIGN                                                   !0, 36
    5     2      > RETURN                                                   !0
    6     3*     > RETURN                                                   null

End of function f

Generated using Vulcan Logic Dumper, using php 8.0.0


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