Case-insensitive Array access in PHP

<?php


	
class caseInsensitiveArray implements ArrayAccess {
    private $items = array();

    public function offsetExists($key) {
        return isset($this->items[strtolower($key)]);
    }

    public function offsetGet($key) {
        return $this->items[strtolower($key)];
    }

    public function offsetSet($key, $value) {
        $this->items[strtolower($key)] = $value;
    }

    public function offsetUnset($key) {
        $v = $this->items[strtolower($key)];
        unset($this->items[strtolower($key)]);
        return $v;
    }
}

	
$a = new caseInsensitiveArray();

$a[‘foo’] = ‘bar’;

var_dump($a[‘FoO’]);