A CodeIgniter helper that outputs the given array as a nested array. This is useful when creating page trees, or passing in a flat array that has relationships in itself.
Save this script to application/helpers/ or wherever you are loading helpers. If this is for PyroCMS, you would put this in pyrocms/addons/shared_addons/helpers/
This can be in your controller, model, or view (not preferable).
$this->load->helper('array_tree');If you use this helper in a lot of locations you can have it load automatically by adding it to the autoload configuration file.
$autoload['helper'] = array('array_tree');Input Code
$arr = array(
array(
'id' => 100,
'parentid' => 0,
'name' => 'a'
),
array(
'id' => 101,
'parentid' => 100,
'name' => 'a'
),
array(
'id' => 102,
'parentid' => 101,
'name' => 'a'
),
array(
'id' => 103,
'parentid' => 101,
'name' => 'a'
)
);
// items which match their `id` to `parentid` are nested in a `children` array
$results = array_tree($arr, 'id', 'parentid', 'children');
print_r($results);Output Results
Array
(
[0] => Array
(
[id] => 100
[parentid] => 0
[name] => a
[children] => Array
(
[0] => Array
(
[id] => 101
[parentid] => 100
[name] => a
[children] => Array
(
[0] => Array
(
[id] => 102
[parentid] => 101
[name] => a
)
[1] => Array
(
[id] => 103
[parentid] => 101
[name] => a
)
)
)
)
)
)