3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = array_fill_keys(range(100000, 200000), array_fill_keys(range('a', 'z'), 'plid')); $headerKey = 'y'; $plids = array(); foreach ($data as $key => &$row) { if (isset($row[$headerKey])) { $plids[] = $row[$headerKey]; } }

preferences:
45.76 ms | 402 KiB | 5 Q