我有一個 php 數組在下面，$two_dimention = array(array("id"=>4, "name" => "Home", "parent" => 0, "depth" => 0),array("id"=>5, "name" => "Menu 1", "parent" => 0, "depth" => 0),array("id"=>6, "name" => "Menu 2", "parent" => 0, "depth" => 0),array("id"=>8, "name" => "Menu 2.1", "parent" => 6, "depth" => 1),array("id"=>10, "name" => "Menu 2.1.1", "parent" => 8, "depth" => 2),array("id"=>11, "name" => "Menu 2.1.2", "parent" => 8, "depth" => 2),array("id"=>9, "name" => "Menu 2.2", "parent" => 6, "depth" => 1),array("id"=>7, "name" => "Menu 3", "parent" => 0, "depth" => 0),array("id"=>18, "name" => "Menu 3.1", "parent" => 7, "depth" => 1),);根據這個 $two_dimention 數組，它將創建 HTML 中的多維訂單列表，如下所示， <ul> <li>Home</li> <li>Menu 1</li> <li>Menu 2 <ul> <li>Menu 2.1 <ul> <li>Menu 2.1.1</li> <li>Menu 2.1.2</li> </ul> </li> <li>Menu 2.2</li> </ul> </li> <li>Menu 3 <ul> <li>Menu 3.1</li> </ul> </li></ul>我怎樣才能通過 PHP for/foreach 循環來做到這一點？
1 回答
慕森卡
TA貢獻1806條經驗 獲得超8個贊
這是答案，使用ref從多維數組創建嵌套數組
function makeRecursive($d, $r = 0, $pk = 'parent', $k = 'id', $c = 'children')
{
$m = [];
foreach ($d as $e) {
isset($m[$e[$pk]]) ?: $m[$e[$pk]] = [];
isset($m[$e[$k]]) ?: $m[$e[$k]] = [];
$m[$e[$pk]][] = array_merge($e, [$c => &$m[$e[$k]]]);
}
return $m[$r]; // remove [0] if there could be more than one root nodes
}
function nested2ul($data)
{
$result = [];
if (sizeof($data) > 0) {
$result[] = '<ul>';
foreach ($data as $entry) {
$result[] = sprintf(
'<li>%s %s</li>',
$entry['name'],
nested2ul($entry['children'])
);
}
$result[] = '</ul>';
}
return implode($result);
}
$temp= makeRecursive($two_dimention);
echo nested2ul($temp);
輸出
<ul>
<li>Home </li>
<li>Menu 1 </li>
<li>Menu 2
<ul>
<li>Menu 2.1
<ul>
<li>Menu 2.1.1 </li>
<li>Menu 2.1.2 </li>
</ul>
</li>
<li>Menu 2.2 </li>
</ul>
</li>
<li>Menu 3
<ul>
<li>Menu 3.1 </li>
</ul>
</li>
</ul>
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