php 拼接顯示二級聯動

獲取出來的數據結構： array(2) {   [0] => array(4) {     ["id"] => int(1)     ["name"] => string(12) "零售經營"     ["pid"] => int(0)     ["children"] => array(4) {       [0] => array(3) {         ["id"] => int(3)  

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