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<?php $foo = false; var_dump(!empty($foo)); var_dump(isset($foo) && $foo > 0); $foo = 0; var_dump(!empty($foo)); var_dump(isset($foo) && $foo > 0); $foo = -1; var_dump(!empty($foo)); var_dump(isset($foo) && $foo > 0); $foo = 1; var_dump(!empty($foo)); var_dump(isset($foo) && $foo > 0);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 9, Position 2 = 11
Branch analysis from position: 9
2 jumps found. (Code = 46) Position 1 = 22, Position 2 = 24
Branch analysis from position: 22
2 jumps found. (Code = 46) Position 1 = 35, Position 2 = 37
Branch analysis from position: 35
2 jumps found. (Code = 46) Position 1 = 48, Position 2 = 50
Branch analysis from position: 48
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 50
Branch analysis from position: 37
Branch analysis from position: 24
Branch analysis from position: 11
filename:       /in/H2C1J
function name:  (null)
number of ops:  53
compiled vars:  !0 = $foo
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <false>
    3     1        INIT_FCALL                                               'var_dump'
          2        ISSET_ISEMPTY_CV                                 ~2      !0
          3        BOOL_NOT                                         ~3      ~2
          4        SEND_VAL                                                 ~3
          5        DO_ICALL                                                 
    4     6        INIT_FCALL                                               'var_dump'
          7        ISSET_ISEMPTY_CV                                 ~5      !0
          8      > JMPZ_EX                                          ~5      ~5, ->11
          9    >   IS_SMALLER                                       ~6      0, !0
         10        BOOL                                             ~5      ~6
         11    >   SEND_VAL                                                 ~5
         12        DO_ICALL                                                 
    6    13        ASSIGN                                                   !0, 0
    7    14        INIT_FCALL                                               'var_dump'
         15        ISSET_ISEMPTY_CV                                 ~9      !0
         16        BOOL_NOT                                         ~10     ~9
         17        SEND_VAL                                                 ~10
         18        DO_ICALL                                                 
    8    19        INIT_FCALL                                               'var_dump'
         20        ISSET_ISEMPTY_CV                                 ~12     !0
         21      > JMPZ_EX                                          ~12     ~12, ->24
         22    >   IS_SMALLER                                       ~13     0, !0
         23        BOOL                                             ~12     ~13
         24    >   SEND_VAL                                                 ~12
         25        DO_ICALL                                                 
   10    26        ASSIGN                                                   !0, -1
   11    27        INIT_FCALL                                               'var_dump'
         28        ISSET_ISEMPTY_CV                                 ~16     !0
         29        BOOL_NOT                                         ~17     ~16
         30        SEND_VAL                                                 ~17
         31        DO_ICALL                                                 
   12    32        INIT_FCALL                                               'var_dump'
         33        ISSET_ISEMPTY_CV                                 ~19     !0
         34      > JMPZ_EX                                          ~19     ~19, ->37
         35    >   IS_SMALLER                                       ~20     0, !0
         36        BOOL                                             ~19     ~20
         37    >   SEND_VAL                                                 ~19
         38        DO_ICALL                                                 
   14    39        ASSIGN                                                   !0, 1
   15    40        INIT_FCALL                                               'var_dump'
         41        ISSET_ISEMPTY_CV                                 ~23     !0
         42        BOOL_NOT                                         ~24     ~23
         43        SEND_VAL                                                 ~24
         44        DO_ICALL                                                 
   16    45        INIT_FCALL                                               'var_dump'
         46        ISSET_ISEMPTY_CV                                 ~26     !0
         47      > JMPZ_EX                                          ~26     ~26, ->50
         48    >   IS_SMALLER                                       ~27     0, !0
         49        BOOL                                             ~26     ~27
         50    >   SEND_VAL                                                 ~26
         51        DO_ICALL                                                 
         52      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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