封装类
<?php class DBDA { public $host="localhost"; //服务器地址 public $uid="root"; //用户名 public $pwd="123"; //密码 public $dbconnect; //连接对象 //操作数据库的方法 //$sql代表需要执行的SQL语句 //$type代表SQL语句的类型，1代表查询，2代表增删改 //$dbname代表要操作的数据库名称 //如果是查询，返回二维数组 //如果是增删改，返回true或false function Query($sql,$type=1,$dbname="mydb") { //造连接对象 $this->dbconnect = new MySQLi($this->host,$this->uid,$this->pwd,$dbname); //判断是否出错 if(!mysqli_connect_error()) { //如果连接成功,执行SQL语句 $result = $this->dbconnect->query($sql); //根据语句类型判断 if($type==1) { //如果是查询语句,返回二维数组 return $result->fetch_all(); } else { //如果是其他语句，返回true或false return $result; } } else { return "连接失败！"; } } }
批量删除
<body>
<h1>主页面</h1>
<form action="piliangshanchu.php" method="post">
<table width="100%" border="1" cellpadding="0" cellspacing="0">
<tr>
<td>代号</td>
<td>姓名</td>
<td>性别</td>
<td>民族</td>
<td>生日</td>
<td>操作</td>
</tr>
<?php
//造对象
$db = new MySQLi("localhost","root","123","mydb");
//判断是否出错
!mysqli_connect_error() or die("连接失败！");
//写SQL语句
$sql = "select * from Info";
//执行SQL语句
$result = $db->query($sql);
//读取数据
$attr = $result->fetch_all();
//遍历数组，显示
foreach($attr as $v)
{
$sex = $v[2]?"男":"女";
$sql = "select Name from Nation where Code = '{$v[3]}'";
$r = $db->query($sql);
$a = $r->fetch_row();
echo "
<tr>
<td>
<input class='ck' name='ck[]' type='checkbox' value='{$v[0]}' />
{$v[0]}</td>
<td>{$v[1]}</td>
<td>{$sex}</td>
<td>{$a[0]}</td>
<td>{$v[4]}</td>
<td><a href='delete.php?code={$v[0]}'>删除</a><a href='update.php?code={$v[0]}'>修改</a></td>
</tr>
";
}
?>
<tr>
<td><input type="checkbox" onclick="CheckAll(this)" />全选</td>
<td><input type="submit" value="批量删除" /></td>
</tr>
</table>
<a href="add.php">添加数据</a>
</form>
</body>
<script type="text/javascript">
function CheckAll(a)
{
var ck = document.getElementsByClassName("ck");
//a.checked;
//document.getElementById().removeAttribute
for(var i=0;i<ck.length;i++)
{
if(a.checked)
{
ck[i].setAttribute("checked","checked");
}
else
{
ck[i].removeAttribute("checked");
}
}
}
</script>
</html>
<?php $ck = $_POST["ck"]; include("DBDA.class.php"); $db = new DBDA(); foreach($ck as $v) { $sql = "delete from Info where Code='{$v}'"; $db->Query($sql,0); } header("location:main.php");