php recursive method to implement infinite classification instance code
- 2021-01-19 22:02:48
- OfStack
Array:
$items = array(
array('id' => 1, 'pid' => 0, 'name' => '1 level 11' ),
array('id' => 11, 'pid' => 0, 'name' => 'www.ofstack.com 1 level 12' ),
array('id' => 2, 'pid' => 1, 'name' => '2 level 21' ),
array('id' => 10, 'pid' => 11, 'name' => '2 level 22' ),
array('id' => 3, 'pid' => 1, 'name' => '2 level 23' ),
array('id' => 12, 'pid' => 11, 'name' => '2 level 24' ),
array('id' => 13, 'pid' => 12, 'name' => '3 level 31' ),
array('id' => 9, 'pid' => 1, 'name' => '2 level 25' ),
);
Function:
function formatTree($array, $pid = 0){
$arr = array();
$tem = array();
foreach ($array as $v) {
if ($v['pid'] == $pid) {
$tem = formatTree($array, $v['id']);
// Determines whether a subarray exists
$tem && $v['son'] = $tem;
$arr[] = $v;
}
}
return $arr;
}