Online PHP editor | refs for LUYSQ

<?php $array = array ( 0 => array ( 'MACHINE' => 'A1', 'LOT' => 'B1077', 'slot' => 1 ), 1 => array ( 'MACHINE' => 'A2', 'LOT' => 'B0229', 'slot' => 2 ), 2 => array ( 'MACHINE' => 'A2', 'LOT' => 'B0132', 'slot' => 2 ), 3 => array ( 'MACHINE' => 'A2', 'LOT' => 'B3967', 'slot' => 2 ), 4 => array ( 'MACHINE' => 'A3', 'LOT' => 'B2644', 'slot' => 3 ) ); $temp = array(); foreach ($array as $v) { $key = $v['MACHINE'] . '#' . $v['slot']; if (!isset($temp[$key])) { $temp[$key] = $v; } else { $temp[$key]['Duplicate'][] = $v['LOT']; } } foreach ($temp as &$v) { if (isset($v['Duplicate'])) $v['Duplicate'] = implode(', ', $v['Duplicate']); } $result = array_values($temp); print_r($result);