多条件查询题目

找房子

 1.这里首先要将大体样式给做出来

<table>
<tr>
<td>区域:<input type="checkbox" name="qx" onclick="quanxuan(this)"  />全选</td>
</tr>
</table>

<?php
//require "DBDA.class.php";
//$db=new DBDA;
$sql1="select distinct Area from House";
$arr1=$db->query($sql1);
foreach($arr1 as $v)
{
    echo "<tr>
    <td><input type='checkbox' name='ck[]' class='ck' value='{$v[0]}' />$v[0]</td>
    </tr>";    
}
?><br />

<table>
<tr>
<td>租赁类型:<input type="checkbox" name="qx1" onclick="quanxuan1(this)" />全选</td>
</tr>
</table>
<?php

$sql2="select distinct RentType from House";
$arr2=$db->query($sql2);
foreach($arr2 as $v)
{
    echo "<tr>
    <td><input type='checkbox' name='ck1[]' class='ck1' value='{$v[0]}' />$v[0]</td>
    </tr>";    
}
?><br />

<table>
<tr>
<td>房屋类型:<input type="checkbox" name="qx2" onclick="quanxuan2(this)" />全选</td>
</tr>
</table>

<?php

$sql3="select distinct HouseType  from House";
$arr3=$db->query($sql3);
foreach($arr3 as $v)
{
    echo "<tr>
    <td><input type='checkbox' name='ck2[]' class='ck2' value='{$v[0]}' />$v[0]</td>
    </tr>";    
}
?>

<div>关键字：<input type="text" name="KeyWord" value='<?php echo $KeyWord ?>' />
<input type="submit" value="搜索" /></div>
<br />

<table width="500px" border="1" cellpadding="0" cellspacing="0">
<tr>
<td>关键字</td>
<td>区域</td>
<td>建筑面积</td>
<td>租金</td>
<td>租赁类型</td>
<td>房屋类型</td>
</tr>
<?php


$arr = $db->query($sql);
foreach($arr as $v)
{
    echo "<tr>
        <td>{$v[1]}</td>
        <td>{$v[2]}</td>
        <td>{$v[3]}</td>
        <td>{$v[4]}</td>
        <td>{$v[5]}</td>
        <td>{$v[6]}</td>
</tr>";
}

?>
</table>

上图是效果

2.然后再就是查询：

<form action="House.php" method="post">
<?php
require "DBDA.class.php";/引用封装类
$db=new DBDA();
$KeyWord="";
$tj1=" 1 = 1 ";
$tj2=" 1 = 1 ";
$tj3=" 1 = 1 ";
$tj4=" 1 = 1 ";
if(!empty($_POST["ck"]))
{
    $arr = $_POST["ck"];//这里获取的是数组
    $str = implode("','",$arr);//需要将数组给拼接成字符串
    $tj1="Area in ('{$str}')" ;
}
if(!empty($_POST["ck1"]))
{
    $arr = $_POST["ck1"];
    $str = implode("','",$arr);
    $tj2="RentType in ('{$str}')";
}
if(!empty($_POST["ck2"]))
{
    $arr = $_POST["ck2"];
    $str = implode("','",$arr);
    $tj3="HouseType in ('{$str}')";
}
if(!empty($_POST["KeyWord"]))
{
    $KeyWord=$_POST["KeyWord"];
    $tj4="KeyWord like '%{$KeyWord}%'";
}
$tj="{$tj1} and {$tj2} and {$tj3} and {$tj4}";
$sql="select * from House where ".$tj;

?>

效果图：选择条件

选出来的效果：

js用来实现多选（这个地方可以用一个js来实现，但是我用了三个，用一个js来实现的话函数需要传两个值）

<script type="text/javascript">
function quanxuan(qx)
{
    var ck = document.getElementsByClassName("ck");
    if(qx.checked)
    {
        for(var i=0;i<ck.length;i++)
        {
            ck[i].setAttribute("checked","checked");
        }
    }
    else{
            for(var i=0;i<ck.length;i++)
            {
            ck[i].removeAttribute("checked");
            }
        }        
}

function quanxuan1(qx1)
{
    var ck1 = document.getElementsByClassName("ck1");
    if(qx1.checked)
    {
        for(var i=0;i<ck1.length;i++)
        {
            ck1[i].setAttribute("checked","checked");
        }
    }
    else{
            for(var i=0;i<ck1.length;i++)
            {
            ck1[i].removeAttribute("checked");
            }
        }        
}

function quanxuan2(qx2)
{
    var ck2 = document.getElementsByClassName("ck2");
    if(qx2.checked)
    {
        for(var i=0;i<ck2.length;i++)
        {
            ck2[i].setAttribute("checked","checked");
        }
    }
    else{
            for(var i=0;i<ck2.length;i++)
            {
            ck2[i].removeAttribute("checked");
            }
        }        
}
</script>