$row = $db->query("SELECT name FROM users WHERE id = 1")->fetch(PDO::FETCH_ASSOC); $name = GetColumn($row, 'name'); echo $name; // Output: John
$result = $db->query("SELECT name FROM users")->fetchAll(PDO::FETCH_ASSOC); $names = GetColumn($result, 'name'); print_r($names); // Output: Array ( [0] => John [1] => Jane [2] => Mike [3] => Lisa )The package/library that provides GetColumn function is not specified in the above examples. It is likely to be a custom utility function implemented by the developer or a part of some custom-made database abstraction library.