* 'value')); // Start with initial preferences * * $preferences->aNewPreference = 'value'; // Set a preference * * unset($preferences->aPreference); // Unset a preference * * // Retrieve a preference and return a default value if the preference does not exist * $anotherPreference = $preferences->get('anotherPreference', 'defaultValue'); */ class Preferences implements Countable { /** * Preferences key-value array * * @var array */ protected $preferences = array(); /** * Constructor * * @param array $preferences Preferences key-value array */ public function __construct(array $preferences = array()) { $this->preferences = $preferences; } /** * Count all preferences * * @return int The number of preferences */ public function count() { return count($this->preferences); } /** * Determine whether a preference exists * * @param string $name * * @return bool */ public function has($name) { return array_key_exists($name, $this->preferences); } /** * Write data to a preference * * @param string $name * @param mixed $value */ public function __set($name, $value) { $this->preferences[$name] = $value; } /** * Retrieve a preference section * * @param string $name * * @return array|null */ public function get($name) { if (array_key_exists($name, $this->preferences)) { return $this->preferences[$name]; } return null; } /** * Retrieve a value from a specific section * * @param string $section * @param string $name * @param null $default * * @return array|null */ public function getValue($section, $name, $default = null) { if (array_key_exists($section, $this->preferences) && array_key_exists($name, $this->preferences[$section]) ) { return $this->preferences[$section][$name]; } return $default; } /** * Magic method so that $obj->value will work. * * @param string $name * * @return mixed */ public function __get($name) { return $this->get($name); } /** * Remove a given preference * * @param string $name Preference name */ public function remove($name) { unset($this->preferences[$name]); } /** * Determine if a preference is set and is not NULL * * @param string $name Preference name * * @return bool */ public function __isset($name) { return isset($this->preferences[$name]); } /** * Unset a given preference * * @param string $name Preference name */ public function __unset($name) { $this->remove($name); } /** * Get preferences as array * * @return array */ public function toArray() { return $this->preferences; } }