测试ArrayAccess

<?phpclass tes implements \ArrayAccess{    public $vari = [];    public function offsetExists($offset){return isset($this->vari[$offset])?true:false;}    public function offsetGet($offset){return $this->vari[$offset];}    public function offsetSet($offset, $value){$this->vari[$offset] = $value;}    public function offsetUnset($offset){unset($this->vari[$offset]);}}$t = new tes;$t['s'] = 'aaaaaa';echo $t['s'];