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<?php $tests=[1=>1,'string 0'=>'0','null'=>null,'false'=>false,'integer 0'=>0,'foo'=>'foo']; foreach($tests as $name=>$test){ if( isset($test) && ($test != "") ){ var_export("$name: pass != \"\""); }else{ var_export("$name: fail != \"\""); } echo "\n"; if( isset($test) && ($test !== '') ){ var_export("$name: pass !== \"\""); }else{ var_export("$name: fail !== \"\""); } echo "\n"; if(!empty($test) ){ var_export("$name: pass !empty"); }else{ var_export("$name: fail !empty"); } echo "\n\n"; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 54
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 54
Branch analysis from position: 3
2 jumps found. (Code = 46) Position 1 = 6, Position 2 = 8
Branch analysis from position: 6
2 jumps found. (Code = 43) Position 1 = 9, Position 2 = 15
Branch analysis from position: 9
1 jumps found. (Code = 42) Position 1 = 20
Branch analysis from position: 20
2 jumps found. (Code = 46) Position 1 = 23, Position 2 = 25
Branch analysis from position: 23
2 jumps found. (Code = 43) Position 1 = 26, Position 2 = 32
Branch analysis from position: 26
1 jumps found. (Code = 42) Position 1 = 37
Branch analysis from position: 37
2 jumps found. (Code = 43) Position 1 = 41, Position 2 = 47
Branch analysis from position: 41
1 jumps found. (Code = 42) Position 1 = 52
Branch analysis from position: 52
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 47
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 32
2 jumps found. (Code = 43) Position 1 = 41, Position 2 = 47
Branch analysis from position: 41
Branch analysis from position: 47
Branch analysis from position: 25
Branch analysis from position: 15
2 jumps found. (Code = 46) Position 1 = 23, Position 2 = 25
Branch analysis from position: 23
Branch analysis from position: 25
Branch analysis from position: 8
Branch analysis from position: 54
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 54
filename:       /in/aIWqA
function name:  (null)
number of ops:  56
compiled vars:  !0 = $tests, !1 = $test, !2 = $name
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    3     1      > FE_RESET_R                                       $4      !0, ->54
          2    > > FE_FETCH_R                                       ~5      $4, !1, ->54
          3    >   ASSIGN                                                   !2, ~5
    4     4        ISSET_ISEMPTY_CV                                 ~7      !1
          5      > JMPZ_EX                                          ~7      ~7, ->8
          6    >   IS_NOT_EQUAL                                     ~8      !1, ''
          7        BOOL                                             ~7      ~8
          8    > > JMPZ                                                     ~7, ->15
    5     9    >   INIT_FCALL                                               'var_export'
         10        NOP                                                      
         11        FAST_CONCAT                                      ~9      !2, '%3A+pass+%21%3D+%22%22'
         12        SEND_VAL                                                 ~9
         13        DO_ICALL                                                 
         14      > JMP                                                      ->20
    7    15    >   INIT_FCALL                                               'var_export'
         16        NOP                                                      
         17        FAST_CONCAT                                      ~11     !2, '%3A+fail+%21%3D++%22%22'
         18        SEND_VAL                                                 ~11
         19        DO_ICALL                                                 
    9    20    >   ECHO                                                     '%0A'
   11    21        ISSET_ISEMPTY_CV                                 ~13     !1
         22      > JMPZ_EX                                          ~13     ~13, ->25
         23    >   IS_NOT_IDENTICAL                                 ~14     !1, ''
         24        BOOL                                             ~13     ~14
         25    > > JMPZ                                                     ~13, ->32
   12    26    >   INIT_FCALL                                               'var_export'
         27        NOP                                                      
         28        FAST_CONCAT                                      ~15     !2, '%3A+pass+%21%3D%3D++%22%22'
         29        SEND_VAL                                                 ~15
         30        DO_ICALL                                                 
         31      > JMP                                                      ->37
   14    32    >   INIT_FCALL                                               'var_export'
         33        NOP                                                      
         34        FAST_CONCAT                                      ~17     !2, '%3A+fail+%21%3D%3D++%22%22'
         35        SEND_VAL                                                 ~17
         36        DO_ICALL                                                 
   16    37    >   ECHO                                                     '%0A'
   18    38        ISSET_ISEMPTY_CV                                 ~19     !1
         39        BOOL_NOT                                         ~20     ~19
         40      > JMPZ                                                     ~20, ->47
   19    41    >   INIT_FCALL                                               'var_export'
         42        NOP                                                      
         43        FAST_CONCAT                                      ~21     !2, '%3A+pass+%21empty'
         44        SEND_VAL                                                 ~21
         45        DO_ICALL                                                 
         46      > JMP                                                      ->52
   21    47    >   INIT_FCALL                                               'var_export'
         48        NOP                                                      
         49        FAST_CONCAT                                      ~23     !2, '%3A+fail+%21empty'
         50        SEND_VAL                                                 ~23
         51        DO_ICALL                                                 
   23    52    >   ECHO                                                     '%0A%0A'
    3    53      > JMP                                                      ->2
         54    >   FE_FREE                                                  $4
   24    55      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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