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<?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' ]; $prepped_copy=preg_replace('/\s+/',' ',$array); while($prepped_copy){ $result[]=implode(' ',array_splice($prepped_copy,0,2)); } var_export($result);

preferences:
107.92 ms | 1625 KiB | 5 Q