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<?php function do_action_ref_array( $callback, $args ) { call_user_func_array( $callback, array_slice( $args, 0, 2 ) ); } $function = function( $arg1, &$arg2 ) { var_dump( $arg1, $arg2 ); return $arg1; }; $a = 1; $b = 2; $args = [$a, &$b]; do_action_ref_array( $function, $args );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/AWr5p
function name:  (null)
number of ops:  12
compiled vars:  !0 = $function, !1 = $a, !2 = $b, !3 = $args
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FAWr5p%3A7%240'
          1        ASSIGN                                                   !0, ~4
   11     2        ASSIGN                                                   !1, 1
   12     3        ASSIGN                                                   !2, 2
   13     4        INIT_ARRAY                                       ~8      !1
          5        ADD_ARRAY_ELEMENT                                ~8      !2
          6        ASSIGN                                                   !3, ~8
   15     7        INIT_FCALL                                               'do_action_ref_array'
          8        SEND_VAR                                                 !0
          9        SEND_VAR                                                 !3
         10        DO_FCALL                                      0          
         11      > RETURN                                                   1

Function do_action_ref_array:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/AWr5p
function name:  do_action_ref_array
number of ops:  6
compiled vars:  !0 = $callback, !1 = $args
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    4     2        INIT_USER_CALL                                0          'call_user_func_array', !0
          3        SEND_ARRAY                                               !1, 2
          4        DO_FCALL                                      0          
    5     5      > RETURN                                                   null

End of function do_action_ref_array

Function %00%7Bclosure%7D%2Fin%2FAWr5p%3A7%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/AWr5p
function name:  {closure}
number of ops:  8
compiled vars:  !0 = $arg1, !1 = $arg2
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    8     2        INIT_FCALL                                               'var_dump'
          3        SEND_VAR                                                 !0
          4        SEND_VAR                                                 !1
          5        DO_ICALL                                                 
    9     6      > RETURN                                                   !0
   10     7*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FAWr5p%3A7%240

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