展平递归数组，＆＃34; untree＆＃34;＆＃39;

Question

我有一个数组，

$arr = Array(
    Array(
        'title' => 'Title 1',
        'id' => 1,
        'parent' => 0,
        'children' => [
            Array(
                'title' => 'Title 1.1',
                'id' => 4,
                'parent' => 1,
                'children' => [
                    Array(
                    'title' => 'Title 1.1.1',
                    'id' => 19,
                    'parent' => 4
                    ),      
                    Array(
                    'title' => 'Title 1.1.2',
                    'id' => 123,
                    'parent' => 4
                    )
                ]
            ),
            Array(
                'title' => 'Title 1.2',
                'id' => 4,
                'parent' => 1,
                'children' => [
                    Array(
                    'title' => 'Title 1.2.1',
                    'id' => 19,
                    'parent' => 4
                    )
                ]
            )
        ]
    ),
    Array(
        'title' => 'Title 2',
        'id' => 1,
        'parent' => 0
    )
);

我希望＆＃34; flatten＆＃34;通过＆＃34;切割＆＃34;将子节点分成单独的项目，给我一个包含这些项目的数组：

$arr = Array(
    Array(
        'title' => 'Title 1',
        'id' => 1,
        'parent' => 0
    ),
    Array(
        'title' => 'Title 1.1',
        'id' => 4,
        'parent' => 1
    ),
    Array(
        'title' => 'Title 1.1.1',
        'id' => 19,
        'parent' => 4
    ),
    Array(
        'title' => 'Title 1.1.2',
        'id' => 123,
        'parent' => 4
    ),           
    Array(
        'title' => 'Title 1.2',
        'id' => 4,
        'parent' => 1
    ),
    Array(
        'title' => 'Title 1.2.1',
        'id' => 19,
        'parent' => 4
    ),
    Array(
        'title' => 'Title 2',
        'id' => 1,
        'parent' => 0
    )
);

有人可以帮我吗？非常感谢！

Answer 1

这会对你有帮助..

<?php
 function recursiveFind(array $items,&$return=array())
{
    foreach($items as $item){
        if(array_key_exists('children',$item)){
            $childs = $item['children'];
            unset($item['children']);
            array_push($return,$item);
            recursiveFind($childs,$return);

        }else{
            array_push($return,$item);
        }

    }
    return $return;
}

$arr = Array(
    Array(
        'title' => 'Title 1',
        'id' => 1,
        'parent' => 0,
        'children' => [
            Array(
                'title' => 'Title 1.1',
                'id' => 4,
                'parent' => 1,
                'children' => [
                    Array(
                    'title' => 'Title 1.1.1',
                    'id' => 19,
                    'parent' => 4
                    ),      
                    Array(
                    'title' => 'Title 1.1.2',
                    'id' => 123,
                    'parent' => 4
                    )
                ]
            ),
            Array(
                'title' => 'Title 1.2',
                'id' => 4,
                'parent' => 1,
                'children' => [
                    Array(
                    'title' => 'Title 1.2.1',
                    'id' => 19,
                    'parent' => 4
                    )
                ]
            )
        ]
    ),
    Array(
        'title' => 'Title 2',
        'id' => 1,
        'parent' => 0
    )
);
echo '<pre>';
print_r(recursiveFind($arr));