PHP批量删除
$db = new MySQLi("localhost","root","123","mydb");
$sql = "insert into kemu values('','基础知识')";
$db->query($sql);
echo $db->insert_id; //取上一次添加数据的主键值 主键为自增加的情况
include("DBDA.class.php");//引用类
$db=new DBDA();
建立数据库操作封装类
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!";
}
}
}
<!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>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 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!"; } } } <?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");