Flush all cache contents
Flush all cache contents.
Flushing the cache is a storage handler responsibility. All
built-in storage handler but the
storage handler support flushing the cache. The
memcache storage handler cannot flush its
User-defined storage handler may or may not support the operation.
This function has no parameters.
TRUE on success or
FALSE on failure.
A return value of
FALSE indicates that
flushing all cache contents has failed or the operation is not
supported by the active storage handler. Applications must not
expect that calling the function will always flush the cache.
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