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<?php $search_array = array('first' => null, 'second' => 4); // returns false echo "1: ".(isset($search_array['first'])?'TRUE':'FALSE').PHP_EOL; // returns true echo '2: '.(array_key_exists('first', $search_array)?'TRUE':'FALSE').PHP_EOL; ?>
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 3, Position 2 = 5
Branch analysis from position: 3
1 jumps found. (Code = 42) Position 1 = 6
Branch analysis from position: 6
2 jumps found. (Code = 43) Position 1 = 11, Position 2 = 13
Branch analysis from position: 11
1 jumps found. (Code = 42) Position 1 = 14
Branch analysis from position: 14
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 13
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 5
2 jumps found. (Code = 43) Position 1 = 11, Position 2 = 13
Branch analysis from position: 11
Branch analysis from position: 13
filename:       /in/Qs8eb
function name:  (null)
number of ops:  18
compiled vars:  !0 = $search_array
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    5     1        ISSET_ISEMPTY_DIM_OBJ                         0          !0, 'first'
          2      > JMPZ                                                     ~2, ->5
          3    >   QM_ASSIGN                                        ~3      'TRUE'
          4      > JMP                                                      ->6
          5    >   QM_ASSIGN                                        ~3      'FALSE'
          6    >   CONCAT                                           ~4      '1%3A+', ~3
          7        CONCAT                                           ~5      ~4, '%0A'
          8        ECHO                                                     ~5
    8     9        ARRAY_KEY_EXISTS                                         'first', !0
         10      > JMPZ                                                     ~6, ->13
         11    >   QM_ASSIGN                                        ~7      'TRUE'
         12      > JMP                                                      ->14
         13    >   QM_ASSIGN                                        ~7      'FALSE'
         14    >   CONCAT                                           ~8      '2%3A+', ~7
         15        CONCAT                                           ~9      ~8, '%0A'
         16        ECHO                                                     ~9
    9    17      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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