PHP多条件查询

     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。以下是实现过程。 
查询条件界面(略): 
查询文件(search.php) 
一、生成查询语句: 
<? 
$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; 

?> 

二、输出查询结果: 
<?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]&nbsp;$myrow[tradetype]&nbsp;$myrow[address]&nbsp;$myrow[wuye]($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></td></tr>"; 
      } 

          $prev_page=$page-1; 
          $next_page=$page+1; 
          echo "<div align='center'>"; 
          echo "&nbsp;第".$page."/".$page_count."页&nbsp"; 
          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>    
        

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。以下是实现过程。 
查询条件界面(略): 
查询文件(search.php) 
一、生成查询语句: 
<? 
$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; 

?> 

二、输出查询结果: 
<?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]&nbsp;$myrow[tradetype]&nbsp;$myrow[address]&nbsp;$myrow[wuye]($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></td></tr>"; 
      } 

          $prev_page=$page-1; 
          $next_page=$page+1; 
          echo "<div align='center'>"; 
          echo "&nbsp;第".$page."/".$page_count."页&nbsp"; 
          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>

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