Serves as a utility function to determine whether a key exists in the cache.

Parameters

$keyint|stringrequired

Cache key to check for existence.

$groupstringrequired

Cache group for the key existence check.

Return

Source

protected function _exists( $key, $group ) {
	return isset( $this->cache[ $group ] ) && ( isset( $this->cache[ $group ][ $key ] ) || array_key_exists( $key, $this->cache[ $group ] ) );
}

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