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<?php echo is_bool(false); echo is_bool(null)? 1 : ' null '; echo is_bool(true); function test(){ return 0; } var_dump(test()); echo (int)(bool)""; // 0 echo 0; // "0"; var_dump((bool)(string)0); // ""?
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 4, Position 2 = 6
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 7
Branch analysis from position: 7
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 6
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CkGik
function name:  (null)
number of ops:  25
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   TYPE_CHECK                                   12  ~0      <false>
          1        ECHO                                                     ~0
    3     2        TYPE_CHECK                                   12          null
          3      > JMPZ                                                     ~1, ->6
          4    >   QM_ASSIGN                                        ~2      1
          5      > JMP                                                      ->7
          6    >   QM_ASSIGN                                        ~2      '+null+'
          7    >   ECHO                                                     ~2
    4     8        TYPE_CHECK                                   12  ~3      <true>
          9        ECHO                                                     ~3
    6    10        INIT_FCALL                                               'var_dump'
         11        INIT_FCALL                                               'test'
         12        DO_FCALL                                      0  $4      
         13        SEND_VAR                                                 $4
         14        DO_ICALL                                                 
    7    15        BOOL                                             ~6      ''
         16        CAST                                          4  ~7      ~6
         17        ECHO                                                     ~7
    8    18        ECHO                                                     0
    9    19        INIT_FCALL                                               'var_dump'
         20        CAST                                          6  ~8      0
         21        BOOL                                             ~9      ~8
         22        SEND_VAL                                                 ~9
         23        DO_ICALL                                                 
         24      > RETURN                                                   1

Function test:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CkGik
function name:  test
number of ops:  2
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E > > RETURN                                                   0
          1*     > RETURN                                                   null

End of function test

Generated using Vulcan Logic Dumper, using php 8.0.0


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