Online PHP editor | output for MNQhf

<?php $pivot = []; $n = 0; for ($i = 1; $i <= 20; $i++) { $pivot[$i] = []; } for($i = 1; $i <= 20; $n++) { $user = &$pivot[$i]; $rand = rand(0, 20); while(in_array($rand, $user) || $rand == $i) { $rand++; } $user[] = $rand; if($n == 10) { $i++; $n = 0; } } foreach(&$pivot as $array) { natsort($array); } /*echo "INSERT INTO `following_pivot` (`uid`, `fid`) VALUES "; foreach($pivot as $key => $piv) { foreach($piv as $pi) { echo "(", $key, ",", $pi, ")"; if($pi !== end($piv) && $piv !== end($pivot)) { echo ","; } else { echo "here!!"; } } echo ","; } echo ";"; */print_r($pivot);