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

Generated using Vulcan Logic Dumper, using php 8.5.0


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