Online PHP editor | refs for 6tVsj

<?php // Assume that this is the data that we get back from get_users or a similar function $users = array( 0 => array( 'name' => 'Tom', 'payments' => array( 0 => array( 'date' => '2020-04-15', 'amount' => '750', ), 1 => array( 'date' => '2020-04-20', 'amount' => '900', ), ), ), 1 => array( 'name' => 'Dick', 'payments' => array( 0 => array( 'date' => '2020-04-10', 'amount' => '750', ), 1 => array( 'date' => '2020-04-15', 'amount' => '900', ), 2 => array( 'date' => '2020-04-25', 'amount' => '1250', ), ), ), 2 => array( 'name' => 'Harry', 'payments' => array( 0 => array( 'date' => '2020-04-24', 'amount' => '750', ), ), ), ); function sort_users_by_date( $user1, $user2 ) { $date1 = end($user1['payments'])['date']; $date2 = end($user2['payments'])['date']; return strtotime($date2) - strtotime($date1); } usort($users, 'sort_users_by_date'); var_dump($users);