php recursive ordering

/**
* Sort ordered hierarchy
* @Param $ arr array
* @param $id id
* @Param $ level hierarchy
* @return array
*/
function sortPid($arr, $id, $level = 0)
{
$data =array();
foreach ($arr as $k=>$v) {
if ($v['parent_id'] == $id) {
$v['level']=$level;
$v['children'] = sortPid($arr, $v['id'], $level+1);
$ Data [] = $ v;
}
}
return $data;
}

/**
* Sort sibling
* @Param $ arr array
* @param $id id
* @Param $ level hierarchy
* @return array
*/
function getTree($arr, $id, $level = 0)
{
static $data;
foreach ($arr as $key=>$val) {
if ($val['parent_id'] == $id) {
$flg = str_repeat('┗━', $level);
$val['title'] = $flg.$val['title'];
$data[] = $val;
getTree($arr, $val['id'], $level+1);
}
}
return $data;
}

/**
* Get a subclass
* @Param $ arr array
* @param $id id
* @Param $ level hierarchy
* @return array
*/
function getSon($array, $id)
{
static $data;
foreach ($array as $k => $v) {
if ($v['parent_id'] == $id) {
$data[] = $array[$k];
getSon($array, $v['id']);
}
}
return $data;
}

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Origin www.cnblogs.com/ssx314/p/11368646.html