Online PHP editor | refs for n16LF

<?php $array = [ ['mail' => 'mail1@example.com', 'coins' => '25000.00'], ['mail' => 'mail2@example.com', 'coins' => '500000.00'], ['mail' => 'mail1@example.com', 'coins' => '10000.00'], ['mail' => 'mail2@example.com', 'coins' => '10000.00'], ['mail' => 'mail3@example.com', 'coins' => '20000.00'], ]; $result = []; foreach ($array as ['mail' => $mail, 'coins' => $coins]) { if (!isset($result[$mail])) { $result[$mail] = [1, $coins]; // declare the data for the first instance of mail } else { ++$result[$mail][0]; // increment the running count $result[$mail][1] += $coins; // add coins to running total } } foreach ($result as $mail => $row) { printf("%s (%d), %.2f coins\n", $mail, ...$row); }