使用php显示类别、子类别和子子类别

<?php
// 定义类别数据
$categories = array(
    array(
        'id' => 1,
        'name' => '类别1',
        'subcategories' => array(
            array(
                'id' => 11,
                'name' => '子类别1',
                'subsubcategories' => array(
                    array(
                        'id' => 111,
                        'name' => '子子类别1'
                    ),
                    array(
                        'id' => 112,
                        'name' => '子子类别2'
                    )
                )
            ),
            array(
                'id' => 12,
                'name' => '子类别2',
                'subsubcategories' => array(
                    array(
                        'id' => 121,
                        'name' => '子子类别3'
                    ),
                    array(
                        'id' => 122,
                        'name' => '子子类别4'
                    )
                )
            )
        )
    ),
    array(
        'id' => 2,
        'name' => '类别2',
        'subcategories' => array(
            array(
                'id' => 21,
                'name' => '子类别3',
                'subsubcategories' => array(
                    array(
                        'id' => 211,
                        'name' => '子子类别5'
                    ),
                    array(
                        'id' => 212,
                        'name' => '子子类别6'
                    )
                )
            ),
            array(
                'id' => 22,
                'name' => '子类别4',
                'subsubcategories' => array(
                    array(
                        'id' => 221,
                        'name' => '子子类别7'
                    ),
                    array(
                        'id' => 222,
                        'name' => '子子类别8'
                    )
                )
            )
        )
    )
);

// 递归函数用于显示类别、子类别和子子类别
function displayCategories($categories) {
    foreach ($categories as $category) {
        echo '类别ID：' . $category['id'] . '<br>';
        echo '类别名称：' . $category['name'] . '<br>';
        
        if (isset($category['subcategories'])) {
            echo '子类别：<br>';
            displayCategories($category['subcategories']);
        }
        
        if (isset($category['subsubcategories'])) {
            echo '子子类别：<br>';
            displayCategories($category['subsubcategories']);
        }
        
        echo '<br>';
    }
}

// 调用函数显示类别、子类别和子子类别
displayCategories($categories);
?>