将PHP数组转换为JSON树 [英] Convert PHP array to JSON tree
本文介绍了将PHP数组转换为JSON树的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个这种格式的数组:
I have got a array in this format:
array(
array('id' => 1, 'parent_id' => null, 'name' => 'lorem ipsum'),
array('id' => 2, 'parent_id' => 1, 'name' => 'lorem ipsum1'),
array('id' => 3, 'parent_id' => 1, 'name' => 'lorem ipsum2'),
array('id' => 4, 'parent_id' => 2, 'name' => 'lorem ipsum3'),
array('id' => 5, 'parent_id' => 3, 'name' => 'lorem ipsum4'),
array('id' => 6, 'parent_id' => null, 'name' => 'lorem ipsum5'),
);
我必须使用以下样式将此数组转换为json对象:
I have to convert this array to json object with this style:
var json = {
id: "1",
name: "loreim ipsum",
data: {},
children: [{
id: "2",
name: "lorem ipsum1",
data: {},
children: [{
id: "3",
name: "lorem ipsum2",
data: {},
children: [{
..............
我该怎么做?谢谢.
推荐答案
我的解决方案:
$data = array(
array('id' => 1, 'parent_id' => null, 'name' => 'lorem ipsum'),
array('id' => 2, 'parent_id' => 1, 'name' => 'lorem ipsum1'),
array('id' => 3, 'parent_id' => 1, 'name' => 'lorem ipsum2'),
array('id' => 4, 'parent_id' => 2, 'name' => 'lorem ipsum3'),
array('id' => 5, 'parent_id' => 3, 'name' => 'lorem ipsum4'),
array('id' => 6, 'parent_id' => null, 'name' => 'lorem ipsum5'),
);
$itemsByReference = array();
// Build array of item references:
foreach($data as $key => &$item) {
$itemsByReference[$item['id']] = &$item;
// Children array:
$itemsByReference[$item['id']]['children'] = array();
// Empty data class (so that json_encode adds "data: {}" )
$itemsByReference[$item['id']]['data'] = new StdClass();
}
// Set items as children of the relevant parent item.
foreach($data as $key => &$item)
if($item['parent_id'] && isset($itemsByReference[$item['parent_id']]))
$itemsByReference [$item['parent_id']]['children'][] = &$item;
// Remove items that were added to parents elsewhere:
foreach($data as $key => &$item) {
if($item['parent_id'] && isset($itemsByReference[$item['parent_id']]))
unset($data[$key]);
}
// Encode:
$json = json_encode($data);
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