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<?php print_r(get_defined_constants(true)['filter']);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/r7gSm
function name:  (null)
number of ops:  8
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                                   'print_r'
          1        INIT_FCALL                                                   'get_defined_constants'
          2        SEND_VAL                                                     <true>
          3        DO_ICALL                                             $0      
          4        FETCH_DIM_R                                          ~1      $0, 'filter'
          5        SEND_VAL                                                     ~1
          6        DO_ICALL                                                     
          7      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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