Question

当我想在我的数据中创建树结构时，我遇到了问题，这是我的样本数据

$categories = array(
    array(
        'id' => 2 ,
        'name' => 'banana',
        'parent' => 1
    ),

    array(
        'id' => 1 ,
        'name' => 'fruit',
        'parent' => 0
    ),

    array(
        'id' => 3 ,
        'name' => 'Monkey',
        'parent' => 4
    ),

    array(
        'id' => 4 ,
        'name' => 'Animal',
        'parent' => 0
    ),

    array(
        'id' => 5 ,
        'name' => 'apple',
        'parent' => 1
    ),

    array(
        'id' => 6 ,
        'name' => 'Cat',
        'parent' => 4
    ),

    array(
        'id' => 7 ,
        'name' => 'Animal Water',
        'parent' => 1
    ),

    array(
        'id' => 8 ,
        'name' => 'fish',
        'parent' => 7
    ),
    array(
        'id' => 9 ,
        'name' => 'frog',
        'parent' => 7
    )
);

然后我想重组那个数组

$fix = array(

    array(
        'id' => 4 ,
        'name' => 'Animal',
        'parent' => 0,
        'child' => array(
            array(
                'id' => 7 ,
                'name' => 'Animal Water',
                'parent' => 1,
                'child' => array(
                    array(
                        'id' => 8 ,
                        'name' => 'fish',
                        'parent' => 7
                    ),
                    array(
                        'id' => 9 ,
                        'name' => 'frog',
                        'parent' => 7
                    )
                )
            ),

            array(
                'id' => 3 ,
                'name' => 'Monkey',
                'parent' => 4
            ),

            array(
                'id' => 6 ,
                'name' => 'Cat',
                'parent' => 4
            ),
        )
    ),

    array(
        'id' => 1 ,
        'name' => 'fruit',
        'parent' => 0,
        'child' => array(
            array(
                'id' => 2 ,
                'name' => 'banana',
                'parent' => 1
            ),



            array(
                'id' => 5 ,
                'name' => 'apple',
                'parent' => 1
            )
        )
    )

);

所以我尝试使用这个功能，但没有帮助我。

$GLOBALS['viyancs'] = array();
$GLOBALS['i'] = 0;
function finding_parent($categories) {

    foreach ($categories as $value) {

        //finding parent
        if ($value['parent'] === 0 ) {
            $GLOBALS['viyancs'][$GLOBALS['i']][$value['id']]= $value;
            $GLOBALS['i']++;
            continue;
        }

        if (isset($GLOBALS['viyancs'][$GLOBALS['i']][$value['parent']])) {
            $GLOBALS['viyancs'][$GLOBALS['i']][$value['parent']]['child']= $value;
        }
        $GLOBALS['i']++;
    }
    return $GLOBALS['viyancs'];
}

var_dump(finding_parent($categories));

还有其他任何建议吗？

Answer 1

你有一个category_id和parent_id

的类别数组

阵（ [0] =＆gt;排列（ [id] =＆gt; 1 [parent] =＆gt; 0 [name] =＆gt;人）

[1] => Array
    (
        [id] => 2
        [parent] => 0
        [name] => Woman
    )

[2] => Array
    (
        [id] => 3
        [parent] => 1
        [name] => Tshirt
    )

[3] => Array
    (
        [id] => 4
        [parent] => 1
        [name] => Jeans
    )

[4] => Array
    (
        [id] => 5
        [parent] => 2
        [name] => woman jeans
    )

[5] => Array
    (
        [id] => 6
        [parent] => 2
        [name] => woman top
    )

[6] => Array
    (
        [id] => 7
        [parent] => 3
        [name] => branded tshirt
    )

[7] => Array
    (
        [id] => 8
        [parent] => 4
        [name] => branded jeans
    )

）

Answer 2

function getCategory($category_array)
{   
foreach($category_array as $key => $category_data):
$cat_option_array;
if($category_data['parent']==0)
{
    $cat_option_array .= "<option value=".$category_data['id'].">".$category_data['name']."</option>";
    foreach($category_array as $subcategory_key => $subcategory_data):
    if($category_data['id']==$subcategory_data['parent'])
    {
        $cat_option_array .= "<option value=".$subcategory_data['id'].">--".$subcategory_data['name']."</option>";

        foreach($category_array as $level2categorykey => $level2category):

        if($level2category['parent']==$subcategory_data['id'])
        {
            $cat_option_array .= "<option value=".$level2category['id'].">----".$level2category['name']."</option>";
        }

        endforeach;
    }
    endforeach;
}
endforeach; 
echo $cat_option_array;
}

如何从父类别的孩子制作树？

2 个答案: