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<?php
/**
* Copyright 2013-2017 Horde LLC (http://www.horde.org/)
*
* See the enclosed file LICENSE for license information (BSD). If you
* did not receive this file, see http://www.horde.org/licenses/bsd.
*
* @category Horde
* @copyright 2013-2017 Horde LLC
* @license http://www.horde.org/licenses/bsd BSD
* @package Support
*/
/**
* An array implemented as an object that contains case-insensitive keys.
*
* @author Michael Slusarz <slusarz@horde.org>
* @category Horde
* @copyright 2013-2017 Horde LLC
* @license http://www.horde.org/licenses/bsd BSD
* @package Support
*/
class Horde_Support_CaseInsensitiveArray extends ArrayIterator
{
/**
*/
public function offsetGet($offset)
{
return (is_null($offset = $this->_getRealOffset($offset)))
? null
: parent::offsetGet($offset);
}
/**
*/
public function offsetSet($offset, $value)
{
if (is_null($roffset = $this->_getRealOffset($offset))) {
parent::offsetSet($offset, $value);
} else {
parent::offsetSet($roffset, $value);
}
}
/**
*/
public function offsetExists($offset)
{
return !is_null($offset = $this->_getRealOffset($offset));
}
/**
*/
public function offsetUnset($offset)
{
if (!is_null($offset = $this->_getRealOffset($offset))) {
parent::offsetUnset($offset);
}
}
/**
* Determines the actual array offset given the input offset.
*
* @param string $offset Input offset.
*
* @return string Real offset or null.
*/
protected function _getRealOffset($offset)
{
/* Optimize: check for base $offset in array first. */
if (parent::offsetExists($offset)) {
return $offset;
}
foreach (array_keys($this->getArrayCopy()) as $key) {
if (strcasecmp($key, $offset) === 0) {
return $key;
}
}
return null;
}
}