我有一个多维数组,我需要创建一个searchCategory($ categories,$ id)函数,该函数必须返回'title'属性的值。
尝试此代码,它仅适用于多维数组的一层。
多维数组:
$categories = array( array(
"id" => 1,
"title" => "Обувь",
'children' => array(
array(
'id' => 2,
'title' => 'Ботинки',
'children' => array(
array('id' => 3, 'title' => 'Кожа'),
array('id' => 4, 'title' => 'Текстиль'),
),
),
array('id' => 5, 'title' => 'Кроссовки',),
)), array(
"id" => 6,
"title" => "Спорт",
'children' => array(
array(
'id' => 7,
'title' => 'Мячи'
)
) ), );
我尝试解决问题的代码:
function searchCategory($categories, $id) {
foreach($categories as $category) {
if($category['id'] == $id) {
echo $category['title'] . '<br>';
}
}
};
我需要我的函数在所有数组中查找id值,并在找到数组的情况下返回标题
答案 0 :(得分:2)
这是递归迭代器案例,请查看内联文档以获取解释
function searchCategory($categories, $id)
{
$arrayiter = new RecursiveArrayIterator($categories);
$iteriter = new RecursiveIteratorIterator($arrayiter);
foreach ($iteriter as $key => $value) {
// checking if iterator comes to point where key is id and value matched
if ($key == 'id' && $value == $id) {
// returning matched value with current iterator instance
return $iteriter->getInnerIterator()['title'];
}
}
return '';
}
echo searchCategory($categories, 2).'<br/>';
echo searchCategory($categories, 7);
RecursiveArrayIterator-此迭代器允许以与ArrayIterator相同的方式遍历数组和对象的同时取消设置和修改值和键。另外,可以迭代当前的迭代器条目。
RecursiveIteratorIterator-可用于通过递归迭代器进行迭代。
RecursiveIteratorIterator::getInnerIterator:获取内部迭代器
答案 1 :(得分:0)
您需要递归创建函数
function searchCategory($categories, $id) {
foreach($categories as $category) {
if($category['id'] == $id)
echo $category['title'] . '<br>';
if(isset($category['children']))
searchCategory($category['children'],$id);
}
}