Make hierarchy from table with PHP - php

Question

I have a table in database and in this table i have added 3 columns that is i, name,parent_id.please see below.
ID | name | parent_id
1 name1 0
2 name2 1
3 name3 1
Now i want to fetch this id from database. I have created a method in PHP and fetch data one by one from database. Please see below
function getData($id)
{
$array = array();
$db = JFactory::getDBO();
$sql = "SELECT * from table_name when id = ".$id;
$db>setQuery($sql);
$fetchAllDatas = $db->getObjectList();
foreach ($fetchAllDatas as $fetchAllData)
{
if($fetchAllData->parent_id > 0)
{
$array[$fetchAllData->parent_id] = $fetchAllData->name;
$this->getData($fetchAllData->parent_id);
}
else
{
$array[$fetchAllData->parent_id] = $fetchAllData->name;
}
}
return $array;
}
Now if i call this method with id 3 like
$this->getData(3); // has a parent
It will return like that
Array(
[0]=>name1
)
But i want like below
Array(
[1]=>name3,
[0]=>name1
)
I know i have redefine array if we have parent but how i manage it.
i have used array_push php function but its not work with my condition.

Answer 1

foreach ($fetchAllDatas as $fetchAllData)
{
$array[$fetchAllData->parent_id] = $fetchAllData->name;
if($fetchAllData->parent_id > 0)
array_push($array,$this->getData($fetchAllData->parent_id));
}
return $array;
1)Because you do $array[$fetchAllData->parent_id] = $fetchAllData->name; in the if and in the else, you do this in both cases so put out of if..else.
2) Try to push the result of your second call in the original array to get what you want.

Answer 2

you have unique ID in your table, so if you call your query it will always return only one result. Maybe you wanted to write query this way:
$sql = "SELECT * from table_name when parent_id = ".$id;
if you want to get the result with given ID and his parent, you should add this after calling $this->fetchSharedFolder(...);
$array = array_merge($array, $this->getData($fetchAllData->parent_id));