【www.bbyears.com--php常用代码】
数组：
代码如下$items = array(
array("id" => 1, "pid" => 0, "name" => "一级11" ),
array("id" => 11, "pid" => 0, "name" => "一级12" ),
array("id" => 2, "pid" => 1, "name" => "二级21" ),
array("id" => 10, "pid" => 11, "name" => "二级22" ),
array("id" => 3, "pid" => 1, "name" => "二级23" ),
array("id" => 12, "pid" => 11, "name" => "二级24" ),
array("id" => 13, "pid" => 12, "name" => "三级31" ),
array("id" => 9, "pid" => 1, "name" => "二级25" ),
);
函数：
代码如下function formatTree($array, $pid = 0){
$arr = array();
$tem = array();
foreach ($array as $v) {
if ($v["pid"] == $pid) {
$tem = formatTree($array, $v["id"]);
//判断是否存在子数组
$tem && $v["son"] = $tem;
$arr[] = $v;
}
}
return $arr;
}
其中，数组一定要包含id和pid用以指定数组值之间的层级关系