PHP 练习：租房子

<form action="text.php" method="post">
区域：<input type="checkbox" id="qy" onclick="CheckAll()"  />全选<br />
<?php
include("../dbda.class.php");
$db = new dbda();
$sql = "select Area from House";
$area = $db->Query($sql);
foreach($area as $v)
{
    echo "<input type='checkbox' class='qy' value='{$v[0]}' name='qy[]'/>{$v[0]}";
}
?>
<br /><br /><br />
租赁类型: <input type="checkbox" id="lx" onclick="LXCheckAll()"   />全选<br />
<?php 
$sql1 = "select distinct RentType from House";
$renttype = $db->Query($sql1);
foreach($renttype as $v)
{
    echo "<input type='checkbox' class='lx' value='{$v[0]}' name='lx[]'/>{$v[0]}";
}
?>
<br /><br /><br />
房屋类型：<input type="checkbox" id="fw" onclick="FWCheckAll()"  />全选<br />
<?php
$sql2 = "select HouseType from House ";
$housetype = $db->Query($sql2);
foreach($housetype as $v)
{
    echo "<input type='checkbox' class='fw' value='{$v[0]}' name='fw[]'/>{$v[0]}";
}
?>
<br /><br /><br />
关键字:<input type="text" name="keyword" /><br />
<br />
<br />
<input type="submit" value="搜索" />
</form>


<?php




$tj1 = " 1=1";
$tj2 = " 1=1";
$tj3 = " 1=1";
$tj4 = " 1=1";
if(!empty($_POST["qy"]))
{
    $qy = implode("','",$_POST["qy"]);
    $tj1 = " Area in ('{$qy}')";
}
if(!empty($_POST["lx"]))
{
    $lx = implode("','",$_POST["lx"]);
    $tj2 = " RentType in ('{$lx}')";
}
if(!empty($_POST["fw"]))
{
    $fw = implode("','",$_POST["fw"]);
    $tj3 = " HouseType in ('{$fw}')";
}
if(!empty($_POST["keyword"]))
{
    $tj4 = " KeyWord like '%{$_POST['keyword']}%'";
}
$sqlz = "select * from House where {$tj1} and {$tj2} and {$tj3} and {$tj4}";
$attr = $db->Query($sqlz);
?>
<table width="100%" border="1" cellpadding="0" cellspacing="0">
<tr><td>关键字</td><td>地区</td><td>面积</td><td>房租</td><td>租赁类型</td><td>房屋类型</td></tr>
<?php
foreach($attr 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>

JS页面

<script type="text/javascript">
function CheckAll()
{
    var qx = document.getElementById("qy").checked;
    var ch = document.getElementsByClassName("qy");
    for(var i=0;i<ch.length;i++)
    {
        ch[i].checked = qx;
    }
}
function LXCheckAll()
{
    var qx = document.getElementById("lx").checked;
    var ch = document.getElementsByClassName("lx");
    for(var i=0;i<ch.length;i++)
    {
        ch[i].checked = qx;
    }
}
function FWCheckAll()
{
    var qx = document.getElementById("fw").checked;
    var ch = document.getElementsByClassName("fw");
    for(var i=0;i<ch.length;i++)
    {
        ch[i].checked = qx;
    }
}
</script>