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<?php $timezoneAbbr = DateTimeZone::listAbbreviations(); $results = []; foreach ($timezoneAbbr as $group => $timezones) { foreach ($timezones as $timezoneData) { if ($timezoneData['dst'] === false) { continue; } $timezone = new DateTimeZone($timezoneData['timezone_id']); $transitions = $timezone->getTransitions(1546322400, 1577858400); if (!is_array($transitions)) { continue; } foreach ($transitions as $transition) { if (strpos($transition['time'], '2019-01-01') !== false) { continue; } if ($transition['isdst'] === true) { continue; } $date = new DateTime($transition['time']); $date->modify('+1 hour')->modify('-1 second'); $date->setTimezone($timezone); $date = DateTime::createFromFormat('Y-m-d H:i:s', $date->format('Y-m-d H:i:s'), $timezone); if ($date->format('I') === '0') { $results[$date->format(DateTime::ATOM).' '.$timezone->getName()] = 1; } } } } array_map(function ($x) { echo $x, PHP_EOL; }, array_keys($results));
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 5, Position 2 = 85
Branch analysis from position: 5
2 jumps found. (Code = 78) Position 1 = 6, Position 2 = 85
Branch analysis from position: 6
2 jumps found. (Code = 77) Position 1 = 8, Position 2 = 83
Branch analysis from position: 8
2 jumps found. (Code = 78) Position 1 = 9, Position 2 = 83
Branch analysis from position: 9
2 jumps found. (Code = 43) Position 1 = 12, Position 2 = 13
Branch analysis from position: 12
1 jumps found. (Code = 42) Position 1 = 8
Branch analysis from position: 8
Branch analysis from position: 13
2 jumps found. (Code = 43) Position 1 = 27, Position 2 = 28
Branch analysis from position: 27
1 jumps found. (Code = 42) Position 1 = 8
Branch analysis from position: 8
Branch analysis from position: 28
2 jumps found. (Code = 77) Position 1 = 29, Position 2 = 81
Branch analysis from position: 29
2 jumps found. (Code = 78) Position 1 = 30, Position 2 = 81
Branch analysis from position: 30
2 jumps found. (Code = 43) Position 1 = 37, Position 2 = 38
Branch analysis from position: 37
1 jumps found. (Code = 42) Position 1 = 29
Branch analysis from position: 29
Branch analysis from position: 38
2 jumps found. (Code = 43) Position 1 = 41, Position 2 = 42
Branch analysis from position: 41
1 jumps found. (Code = 42) Position 1 = 29
Branch analysis from position: 29
Branch analysis from position: 42
2 jumps found. (Code = 43) Position 1 = 71, Position 2 = 80
Branch analysis from position: 71
1 jumps found. (Code = 42) Position 1 = 29
Branch analysis from position: 29
Branch analysis from position: 80
Branch analysis from position: 81
1 jumps found. (Code = 42) Position 1 = 8
Branch analysis from position: 8
Branch analysis from position: 81
Branch analysis from position: 83
1 jumps found. (Code = 42) Position 1 = 5
Branch analysis from position: 5
Branch analysis from position: 83
Branch analysis from position: 85
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 85
filename:       /in/vslF6
function name:  (null)
number of ops:  95
compiled vars:  !0 = $timezoneAbbr, !1 = $results, !2 = $timezones, !3 = $group, !4 = $timezoneData, !5 = $timezone, !6 = $transitions, !7 = $transition, !8 = $date
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_STATIC_METHOD_CALL                                  'DateTimeZone', 'listAbbreviations'
          1        DO_FCALL                                      0  $9      
          2        ASSIGN                                                   !0, $9
    5     3        ASSIGN                                                   !1, <array>
    6     4      > FE_RESET_R                                       $12     !0, ->85
          5    > > FE_FETCH_R                                       ~13     $12, !2, ->85
          6    >   ASSIGN                                                   !3, ~13
    7     7      > FE_RESET_R                                       $15     !2, ->83
          8    > > FE_FETCH_R                                               $15, !4, ->83
    8     9    >   FETCH_DIM_R                                      ~16     !4, 'dst'
         10        TYPE_CHECK                                    4          ~16
         11      > JMPZ                                                     ~17, ->13
    9    12    > > JMP                                                      ->8
   12    13    >   NEW                                              $18     'DateTimeZone'
         14        CHECK_FUNC_ARG                                           
         15        FETCH_DIM_FUNC_ARG                               $19     !4, 'timezone_id'
         16        SEND_FUNC_ARG                                            $19
         17        DO_FCALL                                      0          
         18        ASSIGN                                                   !5, $18
   13    19        INIT_METHOD_CALL                                         !5, 'getTransitions'
         20        SEND_VAL_EX                                              1546322400
         21        SEND_VAL_EX                                              1577858400
         22        DO_FCALL                                      0  $22     
         23        ASSIGN                                                   !6, $22
   14    24        TYPE_CHECK                                  128  ~24     !6
         25        BOOL_NOT                                         ~25     ~24
         26      > JMPZ                                                     ~25, ->28
   15    27    > > JMP                                                      ->8
   18    28    > > FE_RESET_R                                       $26     !6, ->81
         29    > > FE_FETCH_R                                               $26, !7, ->81
   19    30    >   INIT_FCALL                                               'strpos'
         31        FETCH_DIM_R                                      ~27     !7, 'time'
         32        SEND_VAL                                                 ~27
         33        SEND_VAL                                                 '2019-01-01'
         34        DO_ICALL                                         $28     
         35        TYPE_CHECK                                  1018          $28
         36      > JMPZ                                                     ~29, ->38
   20    37    > > JMP                                                      ->29
   23    38    >   FETCH_DIM_R                                      ~30     !7, 'isdst'
         39        TYPE_CHECK                                    8          ~30
         40      > JMPZ                                                     ~31, ->42
   24    41    > > JMP                                                      ->29
   27    42    >   NEW                                              $32     'DateTime'
         43        CHECK_FUNC_ARG                                           
         44        FETCH_DIM_FUNC_ARG                               $33     !7, 'time'
         45        SEND_FUNC_ARG                                            $33
         46        DO_FCALL                                      0          
         47        ASSIGN                                                   !8, $32
   28    48        INIT_METHOD_CALL                                         !8, 'modify'
         49        SEND_VAL_EX                                              '%2B1+hour'
         50        DO_FCALL                                      0  $36     
         51        INIT_METHOD_CALL                                         $36, 'modify'
         52        SEND_VAL_EX                                              '-1+second'
         53        DO_FCALL                                      0          
   29    54        INIT_METHOD_CALL                                         !8, 'setTimezone'
         55        SEND_VAR_EX                                              !5
         56        DO_FCALL                                      0          
   30    57        INIT_STATIC_METHOD_CALL                                  'DateTime', 'createFromFormat'
         58        SEND_VAL                                                 'Y-m-d+H%3Ai%3As'
         59        INIT_METHOD_CALL                                         !8, 'format'
         60        SEND_VAL_EX                                              'Y-m-d+H%3Ai%3As'
         61        DO_FCALL                                      0  $39     
         62        SEND_VAR                                                 $39
         63        SEND_VAR                                                 !5
         64        DO_FCALL                                      0  $40     
         65        ASSIGN                                                   !8, $40
   31    66        INIT_METHOD_CALL                                         !8, 'format'
         67        SEND_VAL_EX                                              'I'
         68        DO_FCALL                                      0  $42     
         69        IS_IDENTICAL                                             $42, '0'
         70      > JMPZ                                                     ~43, ->80
   32    71    >   INIT_METHOD_CALL                                         !8, 'format'
         72        SEND_VAL_EX                                              'Y-m-d%5CTH%3Ai%3AsP'
         73        DO_FCALL                                      0  $44     
         74        CONCAT                                           ~45     $44, '+'
         75        INIT_METHOD_CALL                                         !5, 'getName'
         76        DO_FCALL                                      0  $46     
         77        CONCAT                                           ~47     ~45, $46
         78        ASSIGN_DIM                                               !1, ~47
         79        OP_DATA                                                  1
   18    80    > > JMP                                                      ->29
         81    >   FE_FREE                                                  $26
    7    82      > JMP                                                      ->8
         83    >   FE_FREE                                                  $15
    6    84      > JMP                                                      ->5
         85    >   FE_FREE                                                  $12
   39    86        INIT_FCALL                                               'array_map'
         87        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FvslF6%3A39%240'
         88        SEND_VAL                                                 ~49
         89        INIT_FCALL                                               'array_keys'
         90        SEND_VAR                                                 !1
         91        DO_ICALL                                         $50     
         92        SEND_VAR                                                 $50
         93        DO_ICALL                                                 
         94      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2FvslF6%3A39%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/vslF6
function name:  {closure}
number of ops:  4
compiled vars:  !0 = $x
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
          0  E >   RECV                                             !0      
          1        ECHO                                                     !0
          2        ECHO                                                     '%0A'
          3      > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FvslF6%3A39%240

Generated using Vulcan Logic Dumper, using php 8.0.0


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