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<?php $array = [null => 42, false => 43]; var_dump(array_key_exists(null, $array)); // true var_dump(array_key_exists('', $array)); // true var_dump(array_key_exists(false, $array)); // true var_dump(array_key_exists(0, $array)); // true var_dump(array_key_exists(0.0, $array)); // true print count($array). " elements in the array\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ITVEd
function name:  (null)
number of ops:  27
compiled vars:  !0 = $array
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   INIT_ARRAY                                           ~1      42, null
          1        ADD_ARRAY_ELEMENT                                    ~1      43, <false>
          2        ASSIGN                                                       !0, ~1
    5     3        INIT_FCALL                                                   'var_dump'
          4        ARRAY_KEY_EXISTS                                     ~3      null, !0
          5        SEND_VAL                                                     ~3
          6        DO_ICALL                                                     
    6     7        INIT_FCALL                                                   'var_dump'
          8        ARRAY_KEY_EXISTS                                     ~5      '', !0
          9        SEND_VAL                                                     ~5
         10        DO_ICALL                                                     
    7    11        INIT_FCALL                                                   'var_dump'
         12        ARRAY_KEY_EXISTS                                     ~7      <false>, !0
         13        SEND_VAL                                                     ~7
         14        DO_ICALL                                                     
    8    15        INIT_FCALL                                                   'var_dump'
         16        ARRAY_KEY_EXISTS                                     ~9      0, !0
         17        SEND_VAL                                                     ~9
         18        DO_ICALL                                                     
    9    19        INIT_FCALL                                                   'var_dump'
         20        ARRAY_KEY_EXISTS                                     ~11     0, !0
         21        SEND_VAL                                                     ~11
         22        DO_ICALL                                                     
   11    23        COUNT                                                ~13     !0
         24        CONCAT                                               ~14     ~13, '+elements+in+the+array%0A'
         25        ECHO                                                         ~14
         26      > RETURN                                                       1

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