一。PHP+Mysql多条件-多值查询示例代码：
index.html代码：<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>SQL多条件查询示例</title></head><body><form method="post" action="deal.php"><h1>房屋出租</h1>房屋类型：<select name="type"><option value="1">一居室</option><option value="2">二居室</option><option value="3">三居室</option></select>面积：<input name="area" type="text"/>地址：<input name="addr" type="text"/><input name="btn" type="submit" value="搜索" /></form></body></html>
deal.php文件：<?php//连接数据库$conn=mysql_connect("localhost","root","");//选择数据库$db=mysql_select_db("数据库名");//接收 参数$type=$_POST['type'];$area=$_POST['area'];$addr=$_POST['addr'];//SQL语句主题$query="select * from room where "; //根据条件和传的值拼接sql语句//判断面积不为空if($type!=""){ //然后根据具体面积分情况拼接 switch($type){ case 1: //一居室 $query.=" room_type=1"; break; case 2: $query.=" room_type=2"; break; case 3: $query.=" room_type=3"; break; }}//面积if($area!=""){ $query.=" and area ={$area}";}//地址if($addr!=""){ $query.=" and addr like '%{$addr}%'"; //地址}//执行查询$result=mysql_query($query);//遍历结果echo "搜搜结果如下：";while($row=mysql_fetch_array($result)){ echo "地址：".$row['addr']; echo ""; echo "面积：".$row['area']; echo ""; echo "居室：".$row['type']; echo ""; echo "价格：".$row['addr']; echo ""; //等等}?>
二。价格区间式多条件查询
例子：
<?php//把该传的条件传到php程序里：比如有三个条件price=1000~3000，name = nokia，type=2//在php里分别接到这些条件，我定义为以下几个：$pmax = 3000;$pmin = 1000;$name = 'nokia';$type = 2;//下面是sql语句样式：//假如你的sql语句前半部分是$sql = 'select * from `表名` where 1 ';//关键看下面if($pmax & $pmin){$sql .='and price> '.$pmin.' and price < '.$pmin.' ';//注意是.=}if($name){$sql .= 'and name like %'.$name.'% ';}if($type){$sql .= 'and type = '.$type.'';}/*具体连接条件是and 还是 or 根据要求定*/?>
转载于:https://www.cnblogs.com/liuzhuan155/p/6187147.html
