Realization method of recursive sorting of php infinitesimal classification

This paper describes the implementation method of recursive sorting of php infinite pole classification with examples. Share it for your reference. The specific implementation method is as follows:

function order ($array,$pid=0){

    $arr = array();

        

    foreach($array as $v){

        if($v['pid']==$pid){

            $arr[] = $v;

            $arr = array_merge($arr,order($array,$v['id']));

        }

    }

    return $arr;

}

I hope this article is helpful to everyone's PHP programming.