/**
* Extract a slice of the array
*
* PHP Compat
*
* $length == null means up to end of array. Now,
* sonots::array_slice($array, $offset, null, true) is possible.
* <code>
* array_slice($array, $offset, null (or 0 or -0)) returns array(),
* </code>
* thus, there was no way to slice up to end of array with preserving keys.
*
* @access public
* @static
* @param array $array The input array.
* @param int $offset If offset is non-negative, the sequence will start at that offset in the array.
* If offset is negative, the sequence will start that far from the end of the array.
* @param mixed $length If length is given and is positive, then the sequence will have that many elements in it.
* If length is given and is negative then the sequence will stop that many elements from the end of the array.
* If it is omitted or NULL (add), then the sequence will have everything from offset up until the end of the array .
* @param boolean $preserve_keys Note that array_slice() will reorder and reset the array indices by default.
* You can change this behaviour by setting preserve_keys to true.
* @return array
* @version $Id: v 1.0 2008-06-07 11:14:46 sonots $
* @since v 1.7
*/
function array_slice($array, $offset, $length = null, $preserve_keys = false)
{
if (is_null($length)) {
if (!$preserve_keys) {
return array_slice($array, $offset);
} else {
$keys = array_slice(array_keys($array), $offset);
$ret = array();
foreach ($keys as $key) {
$ret[$key] = $array[$key];
}
return $ret;
}
} else {
return php_compat_array_slice($array, $offset, $length, $preserve_keys);
}
}
function array_slice($array, $offset, $length = null, $preserve_keys = false)
{
return php_compat_array_slice($array, $offset, $length, $preserve_keys);
}