foreach ($aData as $p_id=>$p_ip) {
    $p_req = "SELECT ip FROM base WHERE ip='".$p_ip."'";
    $p_res = mysqli_query($db,$p_req);
    if ($p_res) {
        if (mysqli_num_rows($p_res)==0) $p_row[] = $aData[$p_id];
        mysqli_free_result($p_res);
    }
}