一个简单实现多条件查询的例子
author:一佰互联 2019-05-01   click:165
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] $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></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>    如果在使用过程中出现什么问题,请与我联系(yk_lingyun@21cn.com),欢迎指正! 【本文版权归作者与奥索网共同拥有,如需转载,请注明作者及出处】