Online PHP editor | refs for g78VA

<?php $data = array ( '2021-07-07' => array ( 0 => array ( 'id' => 5435435, 'homeID' => 8754, 'match_url' => '/usa/reading-united-ac-vs-ocean-city-noreasters-fc-h2h-stats#1229873', 'competition_id' => 5808, 'matches_completed_minimum' => 12, ), 1 => array ( 'id' => 1229873, 'homeID' => 8754, 'match_url' => '/usa/reading-united-ac-vs-ocean-city-noreasters-fc-h2h-stats#1229873', 'competition_id' => 5808, 'matches_completed_minimum' => 12, ), ), '2021-07-09' => array ( 0 => array ( 'id' => 3243234, 'homeID' => 8754, 'match_url' => '/usa/reading-united-ac-vs-ocean-city-noreasters-fc-h2h-stats#1229873', 'competition_id' => 5808, 'matches_completed_minimum' => 12, ), 1 => array ( 'id' => 1229873, 'homeID' => 8754, 'match_url' => '/usa/reading-united-ac-vs-ocean-city-noreasters-fc-h2h-stats#1229873', 'competition_id' => 5808, 'matches_completed_minimum' => 12, ), ), ); $seen = []; foreach(array_keys($data) as $i) { foreach(array_keys($data[$i]) as $j) { $id = $data[$i][$j]['id']; if( in_array($id, $seen) ) { unset($data[$i][$j]); } else { $seen[] = $id; } } } var_dump($data, $seen);