下面这段代码如何进行htmlentities()之类的html过滤

下面这段代码怎么进行htmlentities()之类的html过滤

应该是过滤keyword，就是把用户输入的搜索内容过滤掉html代码
麻烦知道的大哥直接给代码，小弟不怎么懂php,谢谢了

public function search()

	{

		global $_FANWE;



		$page_args = array(

			'city_py' => CURRENT_CITY_PY,

			'sort' => trim($_FANWE['request']['sort']),

			'keyword' => trim($_FANWE['request']['keyword']),

		);



		$keyword = '';

		if(!empty($page_args['keyword']))

		{

			$page_args['keyword'] = urldecode($page_args['keyword']);

			$keyword = &$page_args['keyword'];



			$keyword_query = clearSymbol($page_args['keyword']);

			if(!empty($keyword_query))

			{

				$search_txt = clearRepeat($keyword_query);

				$keyword_query = segmentToUnicode($keyword_query,'+');

                $fields = ",MATCH (gm.content) AGAINST ('$keyword_query') AS similarity ";

				$where.=" WHERE MATCH (gm.content) AGAINST ('$keyword_query' IN BOOLEAN MODE)";

			}

			else

				$keyword = '';

		}



		if(!empty($keyword))

		{

			$insert_sort = 'gk.cr_sort ASC';



			$city_name = $_FANWE['current_city']['name'];



			if(CURRENT_CITY_PY == CHINA_CITY_PY)

			{

				//全国不包含所有城市商品时

				if($_FANWE['setting']['all_city'] == 0)

				{

					$where.=  " AND gk.city = '$city_name'";

				}

				else

					$insert_sort = 'gk.r_sort ASC';

			}

			elseif(CURRENT_CITY_PY != '')

			{

				//城市显示全国商品时

				if($_FANWE['setting']['index_all'] == 1)

				{

					$fields .= ",(gk.city = '$city_name') as is_now_city";

					$insert_sort = 'is_now_city DESC,'.$insert_sort;

					$quanguo_name = $_FANWE['cache']['city']['all'][CHINA_CITY_PY]['name'];

					$where.=  " AND gk.city IN ('$city_name','$quanguo_name')";

				}

				else

				{

					$where.=  " AND gk.city = '$city_name'";

				}

			}



			$order = '';

			$sort = &$page_args['sort'];

			$sort_array = array('spa'=>'g.shop_price ASC','spd'=>'g.shop_price DESC','eta'=>'gk.end_time ASC','etd'=>'gk.end_time DESC','cca'=>'g.click_count ASC','ccd'=>'g.click_count DESC','sa'=>'g.score ASC','sd'=>'g.score DESC','ba'=>'g.bought ASC','bd'=>'g.bought DESC','da'=>'discount ASC','dd'=>'discount DESC');



			if(array_key_exists($sort,$sort_array))

				$order = $sort_array[$sort];

			else

			{

				unset($page_args['sort']);

				$sort = '';

			}



			if(empty($order))

				$order .= 'similarity DESC,'.$insert_sort.',gk.sort ASC,g.id ASC';

			else

				$order .= ',similarity DESC,'.$insert_sort.',gk.sort ASC,g.id DESC';



			$goods_count = DB::resultFirst('SELECT COUNT(DISTINCT g.id)

				FROM '.DB::table('goods_now_match').' AS gm

				INNER JOIN '.DB::table('goods_now_key').' AS gk ON gk.id = gm.id

				INNER JOIN '.DB::table('goods_now').' AS g ON g.id = gk.id '.$where);



			$pager = buildPage('now/search',$page_args,$goods_count,$_FANWE['page'],24);



			$res = DB::query('SELECT g.id,g.small_img,g.end_time,g.market_price,g.begin_time,g.shop_price,

				gk.city,gk.site_id,g.is_best,g.bought,g.name,g.sort,g.site_name,g.collect_buy,g.click_count,

				g.url,g.collect_count,g.add_time,(g.shop_price / g.market_price) AS discount,g.post_count'.$fields.'

				FROM '.DB::table('goods_now_match').' AS gm

				INNER JOIN '.DB::table('goods_now_key').' AS gk ON gk.id = gm.id

				INNER JOIN '.DB::table('goods_now').' AS g ON g.id = gk.id '.$where.'

				ORDER BY '.$order.' LIMIT '.$pager['limit']);



			$goods_list = array();





			while($goods = DB::fetch($res))

			{

				S('Goods')->goodsFormat($goods);

				$goods_list[] = $goods;

			}

		}



		include template('page/search_index');



		display();

	}

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------解决方案--------------------
如果你的代码本身没有问题的话!只需直接加一个strip_tags函数！

public function search()

	{

		global $_FANWE;



		$page_args = array(

			'city_py' => CURRENT_CITY_PY,

			'sort' => trim($_FANWE['request']['sort']),

			'keyword' => strip_tags(trim($_FANWE['request']['keyword']),

		));//加一个strip_tags这个就可以了



		$keyword = '';

		if(!empty($page_args['keyword']))