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<?php $result=array('a'=>FALSE); $id='a'; var_dump($result); var_dump(!empty($result[$id]) && $result[$id]===FALSE);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 9, Position 2 = 12
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
filename:       /in/ZaaHl
function name:  (null)
number of ops:  15
compiled vars:  !0 = $result, !1 = $id
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
    4     1        ASSIGN                                                       !1, 'a'
    6     2        INIT_FCALL                                                   'var_dump'
          3        SEND_VAR                                                     !0
          4        DO_ICALL                                                     
    8     5        INIT_FCALL                                                   'var_dump'
          6        ISSET_ISEMPTY_DIM_OBJ                             1  ~5      !0, !1
          7        BOOL_NOT                                             ~6      ~5
          8      > JMPZ_EX                                              ~6      ~6, ->12
          9    >   FETCH_DIM_R                                          ~7      !0, !1
         10        TYPE_CHECK                                        4  ~8      ~7
         11        BOOL                                                 ~6      ~8
         12    >   SEND_VAL                                                     ~6
         13        DO_ICALL                                                     
         14      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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