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<?php class Config implements ArrayAccess, Countable { /** * @var ArrayObject */ private $storage; /** * @param array $preset */ public function __construct($preset) { $this->storage = new ArrayObject($preset); $this->storage->setFlags( ArrayObject::STD_PROP_LIST | ArrayObject::ARRAY_AS_PROPS ); } /** * ArrayAccess offsetGet (getter). * * @param string $index */ public function offsetGet($index) { return isset($this->storage->{$index}) ? $this->storage->{$index} : null; } /** * ArrayAccess offsetSet (setter). * * @param string $index * @param mixed $value */ public function offsetSet($index, $value) { if (is_null($index)) { $this->storage[] = $value; } else { $this->storage->{$index} = $value; } } /** * ArrayAccess offsetExists (isset). * * @param string $index */ public function offsetExists($index) { return isset($this->storage->{$index}); } /** * ArrayAccess offsetUnset (unset). * * @param string $index */ public function offsetUnset($index) { unset($this->storage->{$index}); } /** * Magic method (getter). * * @param string $index */ public function __get($index) { return $this->offsetGet($index); } /** * Magic method (setter). * * @param string $index * @param mixed $value */ public function __set($index, $value) { return $this->offsetSet($index, $value); } /** * Magic method (isset). * * @param string $index */ public function __isset($index) { return $this->offsetExists($index); } /** * Magic method (unset). * * @param string $index */ public function __unset($index) { return $this->offsetUnset($index); } /** * Magic method (as function invoker). * * @param mixed $arguments */ public function __invoke(...$arguments) { if (isset($this->storage->{$arguments[0]})) { return $this->storage->{$arguments[0]}; } } /** * Magic method (toString well json). */ public function __toString() { $return = []; foreach ($this->storage as $key => $value) { $return[$key] = $value; } return json_encode($return, JSON_PRETTY_PRINT); } /** * Magic method (override print_r/var_dump). */ public function __debugInfo() { $return = []; foreach ($this->storage as $key => $value) { $return[$key] = $value; } return $return; } /** * Implements Countable */ public function count() { return $this->storage->count(); } } $config = new Config([ 'url' => 'https://example.com', 'title' => 'My dynamic website' ]); echo $config->url.PHP_EOL; echo $config['title'].PHP_EOL; echo count($config).PHP_EOL; echo print_r($config, true).PHP_EOL; echo $config.PHP_EOL;