Heres the code. Sorry if this is a bad question, I'm very new to PHP.
for($i = 0; $i < count($searchsingle); $i++){
    if($yougender !== $searchsingle[$i] && $youOS = $searchsingle[$i+4] && $youmin >= 
        $searchsingle[$i + 5] && $youmax <= $searchsingle[$i + 6]{
Problem Line ----> $theirname = $searchsingle[$i - 1];
        $theirgender = $searchsingle[$i];
        $theirOS = $searchsingle[$i+4];
 
     
    