예약 상수
   이 확장은 다음의 상수들을 정의합니다.
이 확장을 PHP에 내장했거나, 실행시에 동적으로 읽어들일 경우에만 사용할 수
있습니다.
   
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      COUNTER_FLAG_PERSIST
      (integer)
     
     
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       A counter with this flag will be created as a persistent resource.
      
     
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      COUNTER_FLAG_SAVE
      (integer)
     
     
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       A counter with this flag will be saved between invocations of PHP.
      
     
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      COUNTER_FLAG_NO_OVERWRITE
      (integer)
     
     
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       This flag causes counter_create() to avoid overwriting
       an existing named counter with a new one.
      
     
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      COUNTER_META_NAME
      (string)
     
     
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       Pass this constant to get the name of a counter resource or object.
      
     
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      COUNTER_META_IS_PERISTENT
      (string)
     
     
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       Pass this constant to determine whether a counter resource or object is
       persistent (has the COUNTER_FLAG_PERSIST flag).
      
     
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      COUNTER_RESET_NEVER
      (integer)
     
     
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       The counter will never be reset.
      
     
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      COUNTER_RESET_PER_LOAD
      (integer)
     
     
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       The counter will be reset on each invocation of PHP.
      
     
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      COUNTER_RESET_PER_REQUEST
      (integer)
     
     
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       The counter will be reset on each request.