<?php

$arr = array(1,2,3,4,5,6,7,8);

var_dump($arr[1]);
var_dump($arr[0.0836]);
var_dump($arr[NULL]);
var_dump($arr["run away"]);

var_dump($arr[TRUE]);
var_dump($arr[FALSE]);

$fp = fopen(__FILE__, "r");
var_dump($arr[$fp]);

$obj = new stdClass;
try {
    var_dump($arr[$obj]);
} catch (Error $e) {
    echo $e->getMessage(), "\n";
}

$arr1 = Array(1,2,3);
try {
    var_dump($arr[$arr1]);
} catch (Error $e) {
    echo $e->getMessage(), "\n";
}

echo "Done\n";
?>