php数据访问例子：租房信息管理，具体内容如下
1.数据库建表
2. zufangzi.php
<body> <h1>租房子</h1> <form action="zufangzi.php" method="post"> <div>区域：<input type="checkbox" name="qx" onclick="quanxuan(this,'qy')" />全选</div> <div> <?php require "DBDA.class1.php"; $db = new DBDA(); $sqy = "select distinct area from house";//写SQL语句，并去重 $aqy = $db->query($sqy); foreach($aqy as $v) { echo "<input type='checkbox' name='qy[]' value='{$v[0]}' class='qy' />{$v[0]}"; } ?> </div> <br /> <div>租赁类型：<input type="checkbox" name="zlqx" onclick="quanxuan(this,'zl')" />全选</div> <div> <?php $szl = "select distinct renttype from house"; $azl = $db->query($szl); foreach($azl as $v) { echo "<input type='checkbox' name='zl[]' value='{$v[0]}' class='zl' />{$v[0]}"; } ?> </div> <br /> <div>房屋类型：<input type="checkbox" name="fwqx" onclick="quanxuan(this,'fw')" />全选</div> <div> <?php $sfw = "select distinct housetype from house"; $afw = $db->query($sfw); foreach($afw as $v) { echo "<input type='checkbox' name='fw[]' value='{$v[0]}' class='fw' />{$v[0]}"; } ?> </div> <br /> <div>关键字：<input type="text" name="key" /> <input type="submit" value="查询" /></div> </form> <br /> <table width="100%" 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 $tj1 = " 1=1 "; $tj2 = " 1=1 "; $tj3 = " 1=1 "; $tj4 = " 1=1 "; if(!empty($_POST["qy"])) { $aqy = $_POST["qy"]; $sqy = implode("','",$aqy); $tj1 = " area in ('{$sqy}') "; } if(!empty($_POST["zl"])) { $azl = $_POST["zl"]; $szl = implode("','",$azl); $tj2 = " renttype in ('{$szl}') "; } if(!empty($_POST["fw"])) { $afw = $_POST["fw"]; $sfw = implode("','",$afw); $tj3 = " housetype in ('{$sfw}') "; } if(!empty($_POST["key"])) { $k = $_POST["key"]; $tj4 = " keyword like '%{$k}%' "; } $sql = "select * from house where {$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 quanxuan(qx,a) { //找到该全选按钮对应的checkbox列表 var ck = document.getElementsByClassName(a); //找全选按钮选中状态 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>
所引用的封装类
<?php class DBDA { public $host = "localhost"; public $uid = "root"; public $pwd = "123"; public $dbname = "test_123"; //执行SQL语句返回相应的结果 //$sql 要执行的SQL语句 //$type 代表SQL语句的类型，0代表增删改，1代表查询 function query($sql,$type=1) { $db = new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname); $result = $db->query($sql); if($type) { //如果是查询，显示数据 return $result->fetch_all(); } else { //如果是增删改，返回true或者false return $result; } } }
呈现页面
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