php多条件外加查询

<?<br />header("Content-Type:text/html;charset=utf-8");<br />include("../manage/include/function.php");<br />	$brand=substr($_POST["brand"],0,strlen($_POST["brand"])-1); <br />	$color=substr($_POST["color"],0,strlen($_POST["color"])-1); <br />	$caizhi=$_POST["caizhi"];<br />	$style=$_POST["style"];<br />	$kucun=$_POST["kucun"];<br />	echo($brand."</br>");<br />	echo($color."</br>");<br />	echo($caizhi."</br>");<br />	echo($style."</br>");<br />	echo($kucun);<br />	<br />	$q="select * from pros_pro where (1=1)";<br />	if($brand!=null){<br />		$q=$q+"and psp_brand in(".$brand.")";<br />	}<br />	if($color!=null){<br />		$q=$q+"and psp_color in(".$color.")";<br />	}<br />	if($caizhi!=null){<br />		$q=$q+"and psp_caizhi='".$caizhi."'";<br />	}<br />	if($style!=null){<br />		$q=$q+"and psp_style='".$style."'";<br />	}<br />	if($kucun!=null){<br />		$q=$q+"order by psp_stock desc";<br />	}else<br />	{<br />		$q=$q+"order by psp_id desc";<br />	}<br />	<br /><br />	$rows=query($q);<br />	if($row=mysql_fetch_array($rows))<br />	{<br />		do{<br />?><br />			<td align='right'><div align='center'><?php echo $row['psp_name'];?></div></td><br />	<?    }while($row=mysql_fetch_array($rows));<br />	}<br />	else<br />	{?><br />		<td align='right'><div align='center'>没有符合条件的信息，请重新定义搜索条件!</div></td><br />	<?<br />	}<br />	?>