Online PHP editor | output for os89s

<?php $a[] = "paris"; $a[] = "london"; $a[] = "paris"; $a[] = "london tour"; $a[] = "london tours"; $a[] = "london"; $a[] = "londonn"; $b = []; foreach($a as $outerName) { // start optimistic, no similar string found $isUnique = true; foreach($b as $innerName) { // check whether the string already has a similar entry similar_text($outerName, $innerName, $percent); if ($percent > 90) { $isUnique = false; break; } } if ($isUnique) { $b[] = $outerName; } } print_r($b);