[英]Create Tree Structure from Array in PHP
我有一個這樣的數組:
array(
array(id => 7, parent_id => 0, name => Current Assets)
array(id => 8, parent_id => 0, name => Fixed Assets)
array(id => 18, parent_id => 7, name => Assets)
array(id => 38, parent_id => 18, name => Receivable)
array(id => 38, parent_id => 18, name => Inventory)
array(id => 39, parent_id => 0, name => Landed Cost Of Inventory)
array(id => 40, parent_id => 38, name => Jazz Cash)
array(id => 41, parent_id => 39, name => Advance to Vendors)
)
現在我需要一些有效的方法來將它轉換成這樣的樹結構。
array(
array(id => 7, parent_id => 0, name => Current Assets, level=>0)
array(id => 8, parent_id => 0, name => Fixed Asset, level => )
array(id => 18, parent_id => 7, name => Assets, level => 1)
array(id => 38, parent_id => 18, name => Inventory, level => 2)
array(id => 39, parent_id => 0, name => Landed Cost Of Inventory, level => 0)
array(id => 40, parent_id => 38, name => Jazz Cash, level => 3)
array(id => 41, parent_id => 39, name => Advance to Vendors, level => 1)
)
我不需要向左或向右添加它們,我只需要我將傳遞給 jQgrid 的簡單級別。
將所有 id 按parent -> child
的順序收集到一個數組中,其中parent_id
是鍵,它有一個包含所有子 ID 的數組。 第二步是遍歷樹並分配等級。
<?php
function assignLevels(&$data){
$kids = [];
foreach($data as $d){
$kids[ $d['parent_id'] ] = $kids[ $d['parent_id'] ] ?? [];
$kids[ $d['parent_id'] ][] = $d['id'];
}
$data = array_column($data, null, 'id');
traverseTree($kids, 0, $data);
$data = array_values($data);
}
function traverseTree($kids, $id, &$data, $level = 0){
foreach($kids[ $id ] as $sub_id){
$data[ $sub_id ]['level'] = $level;
if(isset($kids[ $sub_id ] )) traverseTree($kids, $sub_id, $data, $level + 1);
}
}
assignLevels($data);
print_r($data);
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