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