Online PHP editor | output for WKEKr

<?php $a = array( 'kaushik', 'kaushik is', 'kaushik is great', 'is', 'is great', 'great' ); //$a = array("usb","pc","cam 168","cam","168","cam 168"); $a = array_unique($a); $print_following = array(); foreach ($a as $key => $b) { $x = 0; for ($i = 0; $i < count($a); $i++) { $c = $a; unset($c[$key]); if ($key == $i) continue; if (strpos($c[$i], $b) === false) { $x++; } if ($x == count($a) - 1) { if (!in_array($i, $print_following)) { array_push($print_following, $key); } } } } foreach ($print_following as $o => $value) { echo $a[$value]. ' '; } ?>