预定义常量

以下常量由本扩展模块定义，因此只有在本扩展模块被编译到 PHP 中，或者在运行时被动态加载后才有效。

COUNTER_FLAG_PERSIST (integer)

A counter with this flag will be created as a persistent resource.

COUNTER_FLAG_SAVE (integer)

A counter with this flag will be saved between invocations of PHP.

COUNTER_FLAG_NO_OVERWRITE (integer)

This flag causes counter_create() to avoid overwriting an existing named counter with a new one.

COUNTER_META_NAME (string)

Pass this constant to get the name of a counter resource or object.

COUNTER_META_IS_PERISTENT (string)

Pass this constant to determine whether a counter resource or object is persistent (has the COUNTER_FLAG_PERSIST flag).

COUNTER_RESET_NEVER (integer)

The counter will never be reset.

COUNTER_RESET_PER_LOAD (integer)

The counter will be reset on each invocation of PHP.

COUNTER_RESET_PER_REQUEST (integer)

The counter will be reset on each request.