根据引用日均实现索引树的示例分析

这篇文章主要介绍了根据引用日均实现索引树的示例分析，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。

$array = array(
    0=>array('id'=>1,'uid'=>0,'menuname'=>'菜单1','url'=>0,'addtime'=>'2018-08-29 16:36:55'),
    1=>array('id'=>2,'uid'=>0,'menuname'=>'菜单2','url'=>0,'addtime'=>'2018-08-29 16:36:55'),
    2=>array('id'=>3,'uid'=>1,'menuname'=>'1子菜单1','url'=>0,'addtime'=>'2018-08-29 16:36:55'),
    3=>array('id'=>4,'uid'=>3,'menuname'=>'1子菜单2','url'=>0,'addtime'=>'2018-08-29 16:36:55'),
    4=>array('id'=>5,'uid'=>2,'menuname'=>'2子菜单1','url'=>0,'addtime'=>'2018-08-29 16:36:55'),
);



function getTree($items,$pid ="uid") {
    $map  = [];
    $tree = [];
    foreach ($items as &$it) $map[$it['id']] = &$it; //数据的ID名生成新的引用索引树
    foreach ($items as $k => &$at){
        $parent = &$map[$at[$pid]];
        if($parent) {
            $parent['children'][] = &$at;
        }else{
            $tree[] = &$at;
        }
    }
    return $tree;
}

print_r(getTree($array));die;

出来的效果是

Array
(
    [0] => Array
        (
            [id] => 1
            [uid] => 0
            [menuname] => 菜单1
            [url] => 0
            [addtime] => 2018-08-29 16:36:55
            [children] => Array
                (
                    [0] => Array
                        (
                            [id] => 3
                            [uid] => 1
                            [menuname] => 1子菜单1
                            [url] => 0
                            [addtime] => 2018-08-29 16:36:55
                            [children] => Array
                                (
                                    [0] => Array
                                        (
                                            [id] => 4
                                            [uid] => 3
                                            [menuname] => 1子菜单2
                                            [url] => 0
                                            [addtime] => 2018-08-29 16:36:55
                                        )

                                )

                        )

                )

        )

    [1] => Array
        (
            [id] => 2
            [uid] => 0
            [menuname] => 菜单2
            [url] => 0
            [addtime] => 2018-08-29 16:36:55
            [children] => Array
                (
                    [0] => Array
                        (
                            [id] => 5
                            [uid] => 2
                            [menuname] => 2子菜单1
                            [url] => 0
                            [addtime] => 2018-08-29 16:36:55
                        )

                )

        )

)

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