PHP实现多条件查询实例代码

<?
$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>