* // Determine if the "session" configuration file exists
* $exists = Config::has('session');
*
* // Determine if the "timezone" option exists in the "application" configuration array
* $exists = Config::has('application.timezone');
*
*
* @param string $key
* @return bool
*/
public static function has($key)
{
return ! is_null(static::get($key));
}
/**
* Get a configuration item.
*
* If no item is requested, the entire configuration array will be returned.
*
*
* // Get the "session" configuration array
* $session = Config::get('session');
*
* // Get the "timezone" option from the "application" configuration file
* $timezone = Config::get('application.timezone');
*
*
* @param string $key
* @param string $default
* @return array
*/
public static function get($key, $default = null)
{
list($file, $key) = static::parse($key);
if ( ! static::load($file))
{
return ($default instanceof Closure) ? call_user_func($default) : $default;
}
if (is_null($key)) return static::$items[$file];
return Arr::get(static::$items[$file], $key, $default);
}
/**
* Set a configuration item's value.
*
*
* // Set the "session" configuration array
* Config::set('session', $array);
*
* // Set the "timezone" option in the "application" configuration file
* Config::set('application.timezone', 'UTC');
*
*
* @param string $key
* @param mixed $value
* @return void
*/
public static function set($key, $value)
{
list($file, $key) = static::parse($key);
static::load($file);
(is_null($key)) ? Arr::set(static::$items, $file, $value) : Arr::set(static::$items[$file], $key, $value);
}
/**
* Parse a configuration key and return its file and key segments.
*
* @param string $key
* @return array
*/
protected static function parse($key)
{
$segments = explode('.', $key);
// If there is only one segment after exploding on dots, we will return NULL
// as the key value, causing the entire configuration array to be returned.
$key = (count($segments) > 1) ? implode('.', array_slice($segments, 1)) : null;
return array($segments[0], $key);
}
/**
* Load all of the configuration items from a configuration file.
*
* @param string $file
* @return bool
*/
protected static function load($file)
{
if (isset(static::$items[$file])) return true;
$config = array();
// Configuration files cascade. Typically, the system configuration array is loaded
// first, followed by the application array, followed by the environment array.
// This allows the convenient overriding of configuration options.
foreach (static::$paths as $directory)
{
if (file_exists($path = $directory.$file.EXT))
{
$config = array_merge($config, require $path);
}
}
// If configuration options were actually found, they will be loaded into the
// array containing all of the options for all files. The array is keyed by the
// configuration file name.
if (count($config) > 0) static::$items[$file] = $config;
return isset(static::$items[$file]);
}
}