<?php
//$array = [1, 3, 4, 5, 6];
//
//var_dump($array[2.3]);
//var_dump($array['3.2']);
//$str = "hello world\n";
//var_dump($str[99]);
//var_dump($str[-3]);
$o = new ArrayObject();
$o['hello'] = 'world';
var_dump($o['hello'], $o);
