Online PHP editor | output for p8cFJ

<?php $resultset = [ ['converternumber' => '1', 'zonenumber' => '1a', 'codeid' => 'test007'], ['converternumber' => '1', 'zonenumber' => '1a', 'codeid' => 'test006'], ['converternumber' => '1', 'zonenumber' => '1a', 'codeid' => 'test0094'], ['converternumber' => '1', 'zonenumber' => '1a', 'codeid' => 'test0098'], ['converternumber' => '1', 'zonenumber' => '1a', 'codeid' => 'test010'], ['converternumber' => '1', 'zonenumber' => '1a', 'codeid' => 'test111'], ['converternumber' => '1', 'zonenumber' => '1a', 'codeid' => 'test 008'], ['converternumber' => '2', 'zonenumber' => '1a', 'codeid' => 'test'], ['converternumber' => '1', 'zonenumber' => '1a', 'codeid' => 'test112'], ['converternumber' => '1', 'zonenumber' => '23', 'codeid' => 'rg'], ['converternumber' => '1', 'zonenumber' => '2a', 'codeid' => 'test001'], ['converternumber' => '1', 'zonenumber' => '2a', 'codeid' => 'test003'], ['converternumber' => '1', 'zonenumber' => '1a', 'codeid' => 'test004'], ['converternumber' => '1', 'zonenumber' => '1a', 'codeid' => 'test002'], ['converternumber' => '1', 'zonenumber' => '1a', 'codeid' => 'test001'], ['converternumber' => '2', 'zonenumber' => 'b2', 'codeid' => 'gffff'], ['converternumber' => '1', 'zonenumber' => 'feh', 'codeid' => 'ndo'], ['converternumber' => '1', 'zonenumber' => 'wr', 'codeid' => 'fxv'] ]; foreach ($resultset as $row) { $info[$row['converternumber']][$row['zonenumber']][] = $row['codeid']; } //var_export($info); echo "converternumbers: " , implode(', ', array_keys($info)); echo "\n---\n"; foreach ($info as $c => $zonenos) { echo "$c contains: " , implode(', ', array_keys($zonenos)) , "\n"; foreach ($zonenos as $zoneno => $codeids) { echo "$c - $zoneno: " , implode(', ', $codeids) , "\n"; } echo "---\n"; } echo "\n----\nThe JSON OUTPUT:\n"; echo json_encode($info);