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<?php var_dump(array_key_exists('first', ['first' => null])); die;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 79) Position 1 = -2
filename:       /in/CRIVL
function name:  (null)
number of ops:  6
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
          1        ARRAY_KEY_EXISTS                                 ~0      'first', <array>
          2        SEND_VAL                                                 ~0
          3        DO_ICALL                                                 
          4      > EXIT                                                     
    4     5*     > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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