php二维数组按照多个key进行排序。
/**
* @param $array
* @param $cols
* @return array
*/
function array_msort($array, $cols) {
$colarr = array();
foreach ($cols as $col => $order) {
$colarr[$col] = array();
foreach ($array as $k => $row) {
$colarr[$col]['_' . $k] = strtolower($row[$col]);
}
}
$eval = 'array_multisort(';
foreach ($cols as $col => $order) {
$eval .= '$colarr[\'' . $col . '\'],' . $order . ',';
}
$eval = substr($eval, 0, -1) . ');';
eval($eval);
$ret = array();
foreach ($colarr as $col => $arr) {
foreach ($arr as $k => $v) {
$k = substr($k, 1);
if (!isset($ret[$k])) $ret[$k] = $array[$k];
$ret[$k][$col] = $array[$k][$col];
}
}
return $ret;
}使用示例：
$arr1 = array(
array('id'=>1,'name'=>'aA','cat'=>'cc'),
array('id'=>2,'name'=>'aa','cat'=>'dd'),
array('id'=>3,'name'=>'bb','cat'=>'cc'),
array('id'=>4,'name'=>'bb','cat'=>'dd')
);
$arr2 = array_msort($arr1, array('name'=>SORT_DESC, 'cat'=>SORT_ASC));