>我的数组看起来像
Array
(
[0] => Array
(
[id] => 1
[parent_id] => 0
[title] => Mobiles & Tablets
[childs] => Array
(
[0] => Array
(
[id] => 10
[parent_id] => 1
[title] => Mobile Phone
)
)
)
[1] => Array
(
[id] => 5
[parent_id] => 0
[title] => Mobile Phones
[childs] => Array
(
[0] => Array
(
[id] => 2
[parent_id] => 5
[title] => Moto G
[childs] => Array
(
[0] => Array
(
[id] => 3
[parent_id] => 2
[title] => Android
)
)
)
[1] => Array
(
[id] => 4
[parent_id] => 5
[title] => Iphone
)
)
)
[2] => Array
(
[id] => 6
[parent_id] => 0
[title] => test
)
[3] => Array
(
[id] => 7
[parent_id] => 0
[title] => Men's Fashion
[childs] => Array
(
[0] => Array
(
[id] => 12
[parent_id] => 7
[title] => Clothing
[childs] => Array
(
[0] => Array
(
[id] => 8
[parent_id] => 12
[title] => Jeans
)
)
)
)
)
[4] => Array
(
[id] => 9
[parent_id] => 0
[title] => test
)
)
我为提取数组编写 php 代码。
public $string = '';
public $result = array();
public function getCategoryListsTree( array $items ){
$this->createCategoryExtractNode($items);
echo '<pre>';
print_r($this->result);
exit;
}
public function createCategoryExtractNode(array $items)
{
foreach ($items as $key => $value) {
$this->string .= $value['title'].' > ';
if(isset($value['childs'])){
$this->string .= $this->createCategoryExtractNode($value['childs']);
}else{
$this->result[$value['id']] = trim($this->string,' > ');
$this->string = '';
}
}
}
输出为
Array
(
[10] => Mobiles & Tablets > Mobile Phone
[3] => Mobile Phones > Moto G > Android
[4] => Iphone
[6] => test
[8] => Men's Fashion > Clothing > Jeans
[9] => test
)
我想要这样的输出
Array
(
[10] => Mobiles & Tablets > Mobile Phone
[3] => Mobile Phones > Moto G > Android
[4] => Mobile Phones > Iphone
[6] => test
[8] => Men's Fashion > Clothing > Jeans
[9] => test
)
请帮忙
谢谢
全局
变量是邪恶的，即使它们被包裹在花哨的OO风格中。 $string是每个createCategoryExtractNode调用的本地上下文。这完成了这项工作：
public $result = array();
public function getCategoryListsTree( array $items ){
$this->createCategoryExtractNode($items);
echo '<pre>';
print_r($this->result);
exit;
}
public function createCategoryExtractNode(array $items, $carrier='')
{
foreach ($items as $key => $value) {
$string = $carrier . $value['title'].' > ';
if(isset($value['childs'])){
$this->createCategoryExtractNode($value['childs'], $string);
}else{
$this->result[$value['id']] = trim($string,' > ');
}
}
}
您需要在每个时刻保持当前path，因此让我们在类定义中添加相应的属性而不是string：
public $path = [];
我们将一个元素推送到path数组，最后弹出数组。因此path属性数组保留项目的当前路径。路径项在到达叶节点时用">"粘合：
public function createCategoryExtractNode(array $items)
{
foreach ($items as $key => $value) {
array_push($this->path, $value['title']);
if (isset($value['childs'])) {
$this->string .= $this->createCategoryExtractNode($value['childs']);
} else {
$this->result[$value['id']] = implode(' > ', $this->path);
}
array_pop($this->path);
}
}
这也完成了工作：
public function createCategoryExtractNode(array $items, $breadcrumbs = array(), $level = 0)
{
foreach ($items as $key => $value) {
$breadcrumbs[$level] = $value['title'].' > ';
if(isset($value['childs'])){
$this->createCategoryExtractNode($value['childs'], $breadcrumbs, $level+1);
}else{
$this->string = implode('',$breadcrumbs);
$this->result[$value['id']] = trim($this->string,' > ');
$this->string = '';
}
}
}