/**
* 创建ElexConfig的实例
* @param $config_file
* @param $options
* @return ElexConfig
*/
public static function getInstance($config_file, $options = null)
{
if (!self::$instance instanceof self) {
self::$use_apc_cache = function_exists('apc_fetch');
// 验证配置文件路径的正确性
self::checkConfigPath($config_file);
// 先尝试从缓存中反序列化
self::$instance = self::getConfigFromCache($config_file);
if (empty(self::$instance)) {
// 创建一个新的ElexConfig对象
self::$instance = new self($config_file, $options);
// 将对象序列化后写入缓存
self::writeConfigToCache($config_file, self::$instance);
}
}
return self::$instance;
}