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<?php $array = array('foo' => null); var_export($array); echo "\nisset? "; var_export(isset($array['foo'])); echo "\narray_key_exists? "; var_export(array_key_exists('foo', $array)); echo "\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/BuVAH
function name:  (null)
number of ops:  16
compiled vars:  !0 = $array
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    3     1        INIT_FCALL                                               'var_export'
          2        SEND_VAR                                                 !0
          3        DO_ICALL                                                 
    4     4        ECHO                                                     '%0Aisset%3F+'
    5     5        INIT_FCALL                                               'var_export'
          6        ISSET_ISEMPTY_DIM_OBJ                         0  ~3      !0, 'foo'
          7        SEND_VAL                                                 ~3
          8        DO_ICALL                                                 
    6     9        ECHO                                                     '%0Aarray_key_exists%3F+'
    7    10        INIT_FCALL                                               'var_export'
         11        ARRAY_KEY_EXISTS                                 ~5      'foo', !0
         12        SEND_VAL                                                 ~5
         13        DO_ICALL                                                 
    8    14        ECHO                                                     '%0A'
         15      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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