Online PHP editor | refs for ASWDV

<?php $a = Array ( '0' => Array ( 'name' => 'Viettel', 'data' => Array ( '0' => '1559881644000,500' ) ), '1' => Array ( 'name' => 'FPT', 'data' => Array ( '0' => '1559994465000,172' ) ), '2' => Array ( 'name' => 'MobiFone', 'data' => Array ( '0' => '1559997314000,11164' ) ), '3' => Array ( 'name' => 'Vietnamobile', 'data' => Array ( '0' => '1559993699000,1246' ) ), '4' => Array ( 'name' => 'Viettel', 'data' => Array ( '0' => '1560000096000,47886' ) ), '5' => Array ( 'name' => 'VinaPhone', 'data' => Array ( '0' => '1559997553000,11132' ) ), '6' => Array ( 'name' => 'VNPT', 'data' => Array ( '0' => '1559993066000,84' ) ) ); $groupBy = []; foreach($a as $v){ array_key_exists($v['name'], $groupBy) ? array_push($groupBy[$v['name']]['data'], $v['data'][0]) : ($groupBy[$v['name']] = $v) ; } echo '<pre>'; print_r(array_values($groupBy));