PHP实现多条件查询实例代码

在我们的网站设计过程中，经常会用到多条件查询，本文的源码是一个二手房屋查询的例子。在本例中，我们要实现能够通过地理位置，物业类型，房屋价格，房屋面积及信息发布日期等多个条件查询到客户所需的资料。

 
<? 
$conn=mysql_connect("localhost","root",""); 
$db=mysql_select_db("lingyun"); 
$query="select * from message where tradetype='".$tradetype."'"; //交易类型，如出租，出售 
$SQL=$SQL . "wuye='" . $wuye . "'"; 
if($housetype!="不限"){ 
$query.=" && housetype='".$housetype."'"; //房屋类型，如二室一厅，三室二厅 
} 
if($degree!="不限"){ 
$query.=" && degree='".$degree."'"; //新旧程度 
} 
if($wuye!="不限"){ 
$query.=" && wuye='".$wuye."'"; //物业类型 如住房，商铺 
} 
if($price2!=""){ 
switch($price1){ 
case "大于": 
$query.=" && price>'".$price2."'"; //价格 
break; 
case "等于": 
$query.=" && price='".$price2."'"; 
break; 
case "小于": 
$query.=" && price<'".$price2."'"; 
break; 
} 
} 
if($area2!=""){ 
switch($area1){ 
case "大于": 
$query.=" && area>'".$area2."'"; //面积 
break; 
case "等于": 
$query.=" && area='".$area2."'"; 
break; 
case "小于": 
$query.=" && area<'".$area2."'"; 
break; 
} 
} 
switch($pubdate){ //发布日期 
case "本星期内": 
$query.=" && TO_DAYS(NOW()) - TO_DAYS(date)<=7"; 
break; 
case "一个月内": 
$query.=" && TO_DAYS(NOW()) - TO_DAYS(date)<=30"; 
break; 
case "三个月内": 
$query.=" && TO_DAYS(NOW()) - TO_DAYS(date)<=91"; 
break; 
case "六个月内": 
$query.=" && TO_DAYS(NOW()) - TO_DAYS(date)<=183"; 
break; 
} 
if($address!=""){ 
$query.=" && address like '%$address%'"; //地址 
} 
if(!$page){ 
$page=1; 
} 
?> 

 
<?php 
if ($page){ 
$page_size=20; 
$result=mysql_query($query); 
#$message_count=mysql_result($result,0,"total"); 
$message_count=10; 
$page_count=ceil($message_count/$page_size); 
$offset=($page-1)*$page_size; 
$query=$query." order by date desc limit $offset, $page_size"; 
$result=mysql_query($query); 
if($result){ 
$rows=mysql_num_rows($result); 
if($rows!=0){ 
while($myrow=mysql_fetch_array($result)){ 
echo "<tr>"; 
echo "<td width='15' height='12'><img src='image/home2.gif' width='14' height='14'></td>"; 
echo "<td width='540' height='12'>$myrow[id] $myrow[tradetype] $myrow[address] $myrow[wuye]($myrow[housetype])<font style='font-size:9pt'>[$myrow[date]]</font>"; 
echo "</td>"; 
echo "<td width='75' height='12'><a href='view_d.php?code=$myrow[code]' target='_blank'>详细内容</a></td>"; 
echo "</tr>"; 
} 
} 
else echo "<tr><td><div align='center'><img src='image/sorry.gif'><br><br>没有找到满足你条件的记录</div>& lt;/td></tr>"; 
} 
$prev_page=$page-1; 
$next_page=$page 1; 
echo "<div align='center'>"; 
echo " 第".$page."/".$page_count."页 "; 
if ($page<=1){ 
echo "|第一页|"; 
} 
else{ 
echo "<a href='$PATH_INFO?page=1'>|第一页|</a>"; 
} 
echo " "; 
if ($prev_page<1){ 
echo "|上一页|"; 
} 
else{ 
echo "<a href='$PATH_INFO?page=$prev_page'>|上一页|</a>"; 
} 
echo " "; 
if ($next_page>$page_count){ 
echo "|下一页|"; 
} 
else{ 
echo "<a href='$PATH_INFO?page=$next_page'>|下一页|</a>"; 
} 
echo " "; 
if ($page>=$page_count){ 
echo "|最后一页|"; 
} 
else{ 
echo "<a href='$PATH_INFO?page=$page_count'>|最后一页|</a>"; 
} 
echo "</div>"; 
} 
else{ 
echo "<p align='center'>现在还没有房屋租赁信息!</p>"; 
} 
echo "<hr width="100%" size="1">"; 
?> 
</table>