$start_pos = ($_GET['start_pos']) ? $_GET['start_pos'] : '1';
$end_point = ($_GET['end_point']) ? $_GET['end_point'] : '5';
 
for($i = $start_pos; $i <= $end_point; $i = $i+15) {
    $html = ($i == '0') ? html($url) : html('https://www.r10.net/sayfa?no='.$i.'');