Difficultés avec la fonction preg_match_all

<span class="topic-count">
  ::before
  "
             24
          "
  ::after
</span> 

preg_match_all("#<span class=\"topic-count\">(.*?)</span>#", $source, $nombre[$i]); 

$result=array();
$page = 201;
while ($page>=1) {
    $source = file_get_contents ("http://www.jeuxvideo.com/forums/0-27047-0-1-0-".$page."-0-counter-strike-global-offensive.htm");
    preg_match_all("#<span class=\"topic-count\">(.*?)</span>#", $source, $nombre[$i]);
    $result = array_merge($result, $nombre[$i][1]);
    print("Page : ".$page ."\n");
    $page-=25;
}
print_r ($nombre);