3v4l.org

run code in 500+ PHP versions simultaneously
<?php $array=[ '2 16 10 4 0 0 0 0 0', '0 0 0 4', '2 15 8 6 0 0 0 0 0', '0 0 0 3', '3 18 12 5 0 0 0 0 0', '0 0 0 2' ]; $pairs=array_chunk(preg_replace('/\s+/',' ',$array),2); foreach($pairs as $pair){ $result[]="{$pair[0]} {$pair[1]}"; } var_export($result);

preferences:
51.22 ms | 1441 KiB | 5 Q