function ait($content,$titlename,$text,$username,$postid,$title,$url,$db_name){
$content=preg_replace("!(@|＠)([\\x{4e00}-\\x{9fa5}A-Za-z0-9_\\-]{1,})(\x20|&nbsp;|<|\xC2\xA0|\r|\n|\x03|\t|,|\\?|\\!|:|;|，|。|？|！|：|；|、|…|$)!ue","'@\\2 \\3'",$content);
if (preg_match('/@/', $content)){
$ei = explode('@', $content);
$num = count($ei);
$num = $num - 1;
for ($i = 1; $i <= $num; $i++) {
$eii = explode('，', $ei[$i]);
$eii = explode(' ', $ei[$i]);
//print_r($eii);
//echo $eii[0].'<br />';
$sql=mysql_query("SELECT *  FROM `user` WHERE `name` LIKE '$eii[0]'");
$c=mysql_num_rows($sql);
if($c=='1'&&isset($username[id])){
$time=time();
mysql_query("INSERT INTO `$db_name`.`ait` (`id`, `aitid`, `taid`, `title`, `titlename`, `text`, `url`, `time`) VALUES (NULL, '$username[name]', '$eii[0]', '$title', '$titlename', '$text', '$url', '$time')");
}
}}

}