3v4l.org

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<?php echo solve("123-123-123-123-213-123-123-123"); function solve(string $quest):string{ $randTab=explode("-",$quest); if(count($randTab)!==8){ throw new \LogicException("not 8 randTab's (".count($randTab).")"); } foreach($randTab as $i=>$wut){ if(!is_numeric($wut)){ throw new \LogicException("randTab {$i} is not numeric! wtf?"); } } $goodSum=$randTab[0]*$randTab[0]*11+$randTab[1]*121+$randTab[2]*$randTab[1]*27+$randTab[3]*23+$randTab[4]*15+$randTab[5]*$randTab[6]*$randTab[7]*11-$randTab[3]*($randTab[5]+$randTab[4]); $goodSum%=100000000; $buf2=hash("md5",(string)$goodSum,false); return $buf2; }

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