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<?php date_default_timezone_set('UTC'); $utc = new DateTimeZone('UTC'); $time = DateTime::createFromFormat('Y-m-d H:i:s', '2014-05-19 11:30:00', $utc); foreach (array('UTC', 'Europe/London', 'BST', 'Etc/GMT+1', 'GMT+1', 'CEST', 'EST', 'GMT-5') as $abbr) { $local = clone $time; try { $zone = new DateTimeZone($abbr); $local2 = new DateTime('2014-05-19 11:30:00', $utc); $local2->setTimezone(new DateTimeZone($abbr)); $local->setTimezone(new DateTimeZone($abbr)); echo "{$abbr}: {$zone->getOffset($time)} {$local->format('H:i P')}", PHP_EOL; echo "{$abbr}: {$zone->getOffset($time)} {$local2->format('H:i P')}", PHP_EOL; } catch (Exception $e) { echo "{$abbr}: ERROR - {$e->getMessage()}", PHP_EOL; } }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 14, Position 2 = 74
Branch analysis from position: 14
2 jumps found. (Code = 78) Position 1 = 15, Position 2 = 74
Branch analysis from position: 15
1 jumps found. (Code = 42) Position 1 = 73
Branch analysis from position: 73
1 jumps found. (Code = 42) Position 1 = 14
Branch analysis from position: 14
Branch analysis from position: 74
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 74
Found catch point at position: 65
Branch analysis from position: 65
2 jumps found. (Code = 107) Position 1 = 66, Position 2 = -2
Branch analysis from position: 66
1 jumps found. (Code = 42) Position 1 = 14
Branch analysis from position: 14
filename:       /in/vGRlO
function name:  (null)
number of ops:  76
compiled vars:  !0 = $utc, !1 = $time, !2 = $abbr, !3 = $local, !4 = $zone, !5 = $local2, !6 = $e
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'date_default_timezone_set'
          1        SEND_VAL                                                 'UTC'
          2        DO_ICALL                                                 
    5     3        NEW                                              $8      'DateTimeZone'
          4        SEND_VAL_EX                                              'UTC'
          5        DO_FCALL                                      0          
          6        ASSIGN                                                   !0, $8
    6     7        INIT_STATIC_METHOD_CALL                                  'DateTime', 'createFromFormat'
          8        SEND_VAL                                                 'Y-m-d+H%3Ai%3As'
          9        SEND_VAL                                                 '2014-05-19+11%3A30%3A00'
         10        SEND_VAR                                                 !0
         11        DO_FCALL                                      0  $11     
         12        ASSIGN                                                   !1, $11
    7    13      > FE_RESET_R                                       $13     <array>, ->74
         14    > > FE_FETCH_R                                               $13, !2, ->74
    8    15    >   CLONE                                            ~14     !1
         16        ASSIGN                                                   !3, ~14
   11    17        NEW                                              $16     'DateTimeZone'
         18        SEND_VAR_EX                                              !2
         19        DO_FCALL                                      0          
         20        ASSIGN                                                   !4, $16
   12    21        NEW                                              $19     'DateTime'
         22        SEND_VAL_EX                                              '2014-05-19+11%3A30%3A00'
         23        SEND_VAR_EX                                              !0
         24        DO_FCALL                                      0          
         25        ASSIGN                                                   !5, $19
   13    26        INIT_METHOD_CALL                                         !5, 'setTimezone'
         27        NEW                                              $22     'DateTimeZone'
         28        SEND_VAR_EX                                              !2
         29        DO_FCALL                                      0          
         30        SEND_VAR_NO_REF_EX                                       $22
         31        DO_FCALL                                      0          
   14    32        INIT_METHOD_CALL                                         !3, 'setTimezone'
         33        NEW                                              $25     'DateTimeZone'
         34        SEND_VAR_EX                                              !2
         35        DO_FCALL                                      0          
         36        SEND_VAR_NO_REF_EX                                       $25
         37        DO_FCALL                                      0          
   15    38        ROPE_INIT                                     5  ~31     !2
         39        ROPE_ADD                                      1  ~31     ~31, '%3A+'
         40        INIT_METHOD_CALL                                         !4, 'getOffset'
         41        SEND_VAR_EX                                              !1
         42        DO_FCALL                                      0  $28     
         43        ROPE_ADD                                      2  ~31     ~31, $28
         44        ROPE_ADD                                      3  ~31     ~31, '+'
         45        INIT_METHOD_CALL                                         !3, 'format'
         46        SEND_VAL_EX                                              'H%3Ai+P'
         47        DO_FCALL                                      0  $29     
         48        ROPE_END                                      4  ~30     ~31, $29
         49        ECHO                                                     ~30
         50        ECHO                                                     '%0A'
   16    51        ROPE_INIT                                     5  ~37     !2
         52        ROPE_ADD                                      1  ~37     ~37, '%3A+'
         53        INIT_METHOD_CALL                                         !4, 'getOffset'
         54        SEND_VAR_EX                                              !1
         55        DO_FCALL                                      0  $34     
         56        ROPE_ADD                                      2  ~37     ~37, $34
         57        ROPE_ADD                                      3  ~37     ~37, '+'
         58        INIT_METHOD_CALL                                         !5, 'format'
         59        SEND_VAL_EX                                              'H%3Ai+P'
         60        DO_FCALL                                      0  $35     
         61        ROPE_END                                      4  ~36     ~37, $35
         62        ECHO                                                     ~36
         63        ECHO                                                     '%0A'
         64      > JMP                                                      ->73
   17    65  E > > CATCH                                       last         'Exception'
   18    66    >   ROPE_INIT                                     3  ~42     !2
         67        ROPE_ADD                                      1  ~42     ~42, '%3A+ERROR+-+'
         68        INIT_METHOD_CALL                                         !6, 'getMessage'
         69        DO_FCALL                                      0  $40     
         70        ROPE_END                                      2  ~41     ~42, $40
         71        ECHO                                                     ~41
         72        ECHO                                                     '%0A'
    7    73    > > JMP                                                      ->14
         74    >   FE_FREE                                                  $13
   20    75      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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