php 将一个二维数组转换成有父子关系的数组_PHP教程

leaf(0); * $nav=$tree->navi(15);       =    __construct(,  = ('id', 'pid'),  = 0->result = ->fields = ->root = ->   (->result  [[->fields[1]]][] = ( ( = ();  > 0; -- (   =>  (!(, -> (!->->tmp = (, ->already[] =  (   =>  ([->fields[0]] == ->tmp[0[][]['child'] = ->tmp[1->tmp = (, [->tmp = ->tmp =    recur_n(,  (   ([->fields[0]] == ->arr[] =  ([->fields[1]] != ->root) ->recur_n(, [->fields[1   recur_p( (  ->arr[] = [->fields[0 (['child']) ->recur_p(['child'   leaf( =  = ( == ) ? ->root :  ->tmp[   navi(->arr = ->recur_n(->result, (-> ->   leafid(->arr = ->arr[] = ->recur_p(->leaf( ->?>