/**
* Sorts the collection by any number of fields
*
* @return Collection
*/
public function sortBy()
{
$args = func_get_args();
$collection = clone $this;
$array = $collection->data;
$params = array();
if (empty($array)) {
return $collection;
}
foreach ($args as $i => $param) {
if (is_string($param)) {
if (strtolower($param) === 'desc') {
${"param_{$i}"} = SORT_DESC;
} else {
if (strtolower($param) === 'asc') {
${"param_{$i}"} = SORT_ASC;
} else {
${"param_{$i}"} = array();
foreach ($array as $index => $row) {
${"param_{$i}"}[$index] = str::ascii(is_array($row) ? str::lower($row[$param]) : str::lower($row->{$param}()));
}
}
}
} else {
${"param_{$i}"} = $args[$i];
}
$params[] =& ${"param_{$i}"};
}
$params[] =& $array;
call_user_func_array('array_multisort', $params);
$collection->data = $array;
return $collection;
}