Search for values in nested array

Question

I have an array as follows

array(2) {
  [\"operator\"] => array(2) {
    [\"qty\"] => int(2)
    [\"id\"] => int(251)
  }
  [\"accessory209\"] =>         


        

Answer 1

$map = array();
foreach ($arr as $v) {
    $map[$v['id']] = 1;
}
//then you can just do this as when needed
$exists = isset($map[211]);

Or if you need the data associated with it

$map = array();
foreach ($arr as $k => $v) {
    $map[$v['id']][$k] = $v;
}
print_r($map[211]);