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<?php declare(strict_types=1); error_reporting(-1); ini_set('display_errors', '1'); var_dump(Locale::acceptFromHttp('zh_Hant_TW')); echo "<br>\n"; var_dump(setlocale(LC_ALL, 'zh_Hant_TW')); echo "<br>\n"; var_dump(Locale::acceptFromHttp('zh_TW')); echo "<br>\n"; var_dump(setlocale(LC_ALL, 'zh_TW')); echo "<br>\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/4DkNT
function name:  (null)
number of ops:  38
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'error_reporting'
          1        SEND_VAL                                                 -1
          2        DO_ICALL                                                 
    4     3        INIT_FCALL                                               'ini_set'
          4        SEND_VAL                                                 'display_errors'
          5        SEND_VAL                                                 '1'
          6        DO_ICALL                                                 
    5     7        INIT_FCALL                                               'var_dump'
          8        INIT_STATIC_METHOD_CALL                                  'Locale', 'acceptFromHttp'
          9        SEND_VAL_EX                                              'zh_Hant_TW'
         10        DO_FCALL                                      0  $2      
         11        SEND_VAR                                                 $2
         12        DO_ICALL                                                 
    6    13        ECHO                                                     '%3Cbr%3E%0A'
    7    14        INIT_FCALL                                               'var_dump'
         15        INIT_FCALL                                               'setlocale'
         16        SEND_VAL                                                 6
         17        SEND_VAL                                                 'zh_Hant_TW'
         18        DO_ICALL                                         $4      
         19        SEND_VAR                                                 $4
         20        DO_ICALL                                                 
    8    21        ECHO                                                     '%3Cbr%3E%0A'
    9    22        INIT_FCALL                                               'var_dump'
         23        INIT_STATIC_METHOD_CALL                                  'Locale', 'acceptFromHttp'
         24        SEND_VAL_EX                                              'zh_TW'
         25        DO_FCALL                                      0  $6      
         26        SEND_VAR                                                 $6
         27        DO_ICALL                                                 
   10    28        ECHO                                                     '%3Cbr%3E%0A'
   11    29        INIT_FCALL                                               'var_dump'
         30        INIT_FCALL                                               'setlocale'
         31        SEND_VAL                                                 6
         32        SEND_VAL                                                 'zh_TW'
         33        DO_ICALL                                         $8      
         34        SEND_VAR                                                 $8
         35        DO_ICALL                                                 
   12    36        ECHO                                                     '%3Cbr%3E%0A'
         37      > RETURN                                                   1

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