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<?php foreach (\DateTimeZone::listIdentifiers(\DateTimeZone::ALL_WITH_BC) as $tz) { try { new \DateTimeZone($tz); if (preg_match('{\AEtc/GMT[+-]\d+\z}', $tz)) { echo "OK: $tz", PHP_EOL; } } catch (\Throwable $ex) { echo "FAIL: $tz", PHP_EOL; } }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 4, Position 2 = 22
Branch analysis from position: 4
2 jumps found. (Code = 78) Position 1 = 5, Position 2 = 22
Branch analysis from position: 5
2 jumps found. (Code = 43) Position 1 = 11, Position 2 = 15
Branch analysis from position: 11
1 jumps found. (Code = 42) Position 1 = 21
Branch analysis from position: 21
1 jumps found. (Code = 42) Position 1 = 4
Branch analysis from position: 4
Branch analysis from position: 15
Branch analysis from position: 22
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 22
Found catch point at position: 16
Branch analysis from position: 16
2 jumps found. (Code = 107) Position 1 = 17, Position 2 = -2
Branch analysis from position: 17
1 jumps found. (Code = 42) Position 1 = 4
Branch analysis from position: 4
filename:       /in/HMcFD
function name:  (null)
number of ops:  24
compiled vars:  !0 = $tz, !1 = $ex
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   INIT_STATIC_METHOD_CALL                                      'DateTimeZone', 'listIdentifiers'
          1        SEND_VAL                                                     4095
          2        DO_FCALL                                          0  $2      
          3      > FE_RESET_R                                           $3      $2, ->22
          4    > > FE_FETCH_R                                                   $3, !0, ->22
    5     5    >   NEW                                                  $4      'DateTimeZone'
          6        SEND_VAR_EX                                                  !0
          7        DO_FCALL                                          0          
          8        FREE                                                         $4
    7     9        FRAMELESS_ICALL_2                preg_match          ~6      '%7B%5CAEtc%2FGMT%5B%2B-%5D%5Cd%2B%5Cz%7D', !0
         10      > JMPZ                                                         ~6, ->15
    8    11    >   NOP                                                          
         12        FAST_CONCAT                                          ~7      'OK%3A+', !0
         13        ECHO                                                         ~7
         14        ECHO                                                         '%0A'
         15    > > JMP                                                          ->21
   10    16  E > > CATCH                                           last         'Throwable'
   11    17    >   NOP                                                          
         18        FAST_CONCAT                                          ~8      'FAIL%3A+', !0
         19        ECHO                                                         ~8
         20        ECHO                                                         '%0A'
    3    21    > > JMP                                                          ->4
         22    >   FE_FREE                                                      $3
   13    23      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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