<?php
$data = [
39 => [
'parent_id' => 38,
'parent_name' => '',
'name' => 'cat1'
],
40 => [
'parent_id' => 38,
'parent_name' => '',
'name' => 'cat2',
'children' => [
58802 => [
'parent_id' => 40,
'parent_name' => 'cat2',
'name' => 'cat2-1',
'children' => [
63540 => [
'parent_id' => 58802,
'parent_name' => 'cat2-1',
'name' => 'cat2-1-1'
]
]
]
]
],
41 => [
'parent_id' => 38,
'parent_name' => '',
'name' => 'cat3'
],
42 => [
'parent_id' => 38,
'parent_name' => '',
'name' => 'cat4'
]
];
$out = [];
function walk($value, $key = null, &$out = []) {
if (is_array($value))
foreach($value as $k => $v)
{
if (is_int($k))
$out[] = $k;
if (is_array($v))
walk($v, $k, $out);
}
else
{
if (is_int($key))
$out[] = $key;
if (is_array($value))
walk($value, $key, $out);
}
}
walk($data, null, $out);
var_dump(array_unique($out)); |
