3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ ["name" => "Gus", "age" => 32], ["name" => "Jon", "age" => 44], ["name" => "Bob", "age" => 32], ["name" => "Jim", "age" => 103], ["name" => "Ted", "age" => 19], ["name" => "Ben", "age" => 32], ]; foreach ($array as &$row) { $row['order'] = &$ref[$row['age']]; } krsort($ref); $order = 0; foreach ($ref as &$v) { $v = ++$order; } var_export($array);

preferences:
74.48 ms | 405 KiB | 5 Q