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<?php function callbackTest($param){ var_dump($param); } call_user_func("callbackTest", array(1,2,3,4,5, new stdClass()));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Ddu5h
function name:  (null)
number of ops:  12
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   INIT_FCALL                                               'callbacktest'
          1        INIT_ARRAY                                       ~0      1
          2        ADD_ARRAY_ELEMENT                                ~0      2
          3        ADD_ARRAY_ELEMENT                                ~0      3
          4        ADD_ARRAY_ELEMENT                                ~0      4
          5        ADD_ARRAY_ELEMENT                                ~0      5
          6        NEW                                              $1      'stdClass'
          7        DO_FCALL                                      0          
          8        ADD_ARRAY_ELEMENT                                ~0      $1
          9        SEND_USER                                                ~0
         10        DO_FCALL                                      0          
         11      > RETURN                                                   1

Function callbacktest:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Ddu5h
function name:  callbackTest
number of ops:  5
compiled vars:  !0 = $param
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    4     1        INIT_FCALL                                               'var_dump'
          2        SEND_VAR                                                 !0
          3        DO_ICALL                                                 
    5     4      > RETURN                                                   null

End of function callbacktest

Generated using Vulcan Logic Dumper, using php 8.0.0


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