php封装+租房子练习题

时间：2023-03-09 16:24:38
php封装+租房子练习题

第一个页面DBDA.class.php

<?php

class DBDA

{

    public $host = "localhost";

    public $uid = "root";

    public $pwd = "root";

    public $dbname = "dbname";

    public function Query($sql,$type=1)//两个参数，第二个参数代表默认值

    {

        $db = new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname);

        $result = $db->query($sql);

        if($type=="1")//定义1类型的是查询，其它类型是增删改

        {

            return $result->fetch_all();

        }else

        {

            return $result;

        }

    }

}

第二个页面main.php

php封装+租房子练习题

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>无标题文档</title>

</head>

<body>

<h1>租房子</h1>

<form action="main.php" method="post">

<div>

    <div>区域：<input type="checkbox" onclick="xuan(this,'qx')" />全选</div>//传入两个参数

    <div>

        <?php

        include("./DBDA.class.php");//引入类文件

        $db = new DBDA();

        $sqx = "select distinct area from housedb";

        $aqx = $db->Query($sqx);

        foreach($aqx as $v)

        {

            echo "<input type='checkbox' name='qx[]' class='qx' value='{$v[0]}' />{$v[0]}";

        }

        ?>

    </div>

</div>

<br />

<div>

    <div>租赁类型：<input type="checkbox" onclick="xuan(this,'zl')" />全选</div>

    <div>

        <?php

        $szl = "select distinct renttype from housedb";

        $azl = $db->Query($szl);

        foreach($azl as $v)

        {

            echo "<input type='checkbox' name='zl[]' class='zl' value='{$v[0]}' />{$v[0]}";

        }

        ?>

    </div>

</div>

<br />

<div>

    <div>房屋类型：<input type="checkbox" onclick="xuan(this,'fw')" />全选</div>

    <div>

        <?php

        $sfw = "select distinct housetype from housedb";

        $afw = $db->Query($sfw);

        foreach($afw as $v)

        {

            echo "<input type='checkbox' name='fw[]' class='fw' value='{$v[0]}' />{$v[0]}";

        }

        ?>

    </div>

</div>

<br />

<div>关键字：<input type="text" name="keywords" />

<input type="submit" value="查询" />

</div>

<br />

</form>

<table width="100%" border="1" cellpadding="0" cellspacing="0">

    <tr>

        <td>关键字</td>

        <td>区域</td>

        <td>使用面积</td>

        <td>租金</td>

        <td>租赁类型</td>

        <td>房屋类型</td>

    </tr>

    <?php

    $tj1 = " 1=1 ";

    $tj2 = " 1=1 ";

    $tj3 = " 1=1 ";

    $tj4 = " 1=1 ";

    if(!empty($_POST["qx"]) && count($_POST["qx"])>0)

    {

         $str = implode("','",$_POST["qx"]);

        $tj1 = " area in ('{$str}') ";

    }

    if(!empty($_POST["zl"]) && count($_POST["zl"])>0)

    {

         $str = implode("','",$_POST["zl"]);

        $tj2 = " renttype in ('{$str}') ";

    }

    if(!empty($_POST["fw"]) && count($_POST["fw"])>0)

    {

         $str = implode("','",$_POST["fw"]);

        $tj3 = " housetype in ('{$str}') ";

    }

    if(!empty($_POST["keywords"]))

    {

        $key = $_POST["keywords"];

        $tj4 = " keyword like '%{$key}%' ";

    }

    $sql = "select * from housedb where {$tj1} and {$tj2} and {$tj3} and {$tj4}";

    echo $sql;

    $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>

</body>

<script type="text/javascript">

function xuan(qx,lei)//方法类似的尽量写一个，改变参数

{

    var ck = document.getElementsByClassName(lei);

    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");

        }

    }

}

</script>

</html>

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