1.在主页面上添加批量删除有关代码
<!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>
<?php
//先判断有没有提交值
$xxm = "";
$tj = " 1=1 ";
$tj2 = " 1=1 ";//再做一个条件
if(!empty($_POST["xm"]) && $_POST["xm"]!="")//这个条件是判断xm的，判断模糊查询。
{
$xxm = $_POST['xm'];
$tj = " name like '%{$_POST['xm']}%' ";
} if(!empty($_POST["mz"]) && $_POST["mz"]!="")//再做一个条件判断另一个条件
{
$mz = $_POST['mz'];//取民族的代号
$tj2 = " nation = '{$_POST['mz']}' ";
}
?>
<br />
<form action="main.php" method="post">
<div>姓名：
<input type="text" name="xm" value="<?php echo $xxm ?>" />
民族代号：
<input type="text" name="mz" />
<input type="submit" value="查询" />
</div>
</form>
<br />
<form action="piliangshanchu.php" method="post">
<table width="100%" border="1" cellpadding="0" cellspacing="0">
<tr>
<td><input type="checkbox" onclick="quanxuan(this)" />代号</td><!--在代号里面做一个全选按钮,再做一个quanxuan方法，传一个this过去-->
<td>姓名</td>
<td>性别</td>
<td>民族</td>
<td>生日</td>
<td>操作</td>
</tr>
<?php
$db = new MySQLi("localhost","root","666","text1");
$sql = "select * from info where ".$tj." and ".$tj2;
$result = $db->query($sql);
$attr = $result->fetch_all();
foreach($attr as $v)
{
echo"<tr>";
$sex = $v[2]?"男":"女";
$name = NationName($v[3]);
$newname = str_replace($xxm,"<mark>{$xxm}</mark>",$v[1]);//替换关键字
echo"<td><input type='checkbox' value='{$v[0]}' name='sc[]' />{$v[0]}</td><td>{$newname}</td><td>{$sex}</td><td>{$name}</td><td>{$v[4]}</td><td><a href='shanchu.php?c={$v[0]}' onclick=\"return confirm('确定删除吗？')\">删除</a><a href='xiugai.php?c={$v[0]}'>修改</a></td";
//在第一列里面做复选框
//name='sc[]'表示提交时提交的是一个数组
//批量删除时增加提示信息“确认删除吗？”。
/*foreach($v as $v1)
{
echo "<td>{$v1}</td>";
}*/
echo"</tr>";
}
function NationName($code)
{
$db = new MySQLi("localhost","root","666","text1");
$sql = "select name from nation where code = '{$code}'";
$result = $db->query($sql);
$attr = $result->fetch_row();
return $attr[0];
}
?>
</table>
<a href="add.php"><input type="button" value="添加数据" /></a>
<input type="submit" value="批量删除" onclick="return confirm('确定删除吗？')" />
</form>
</body>
</html>
2.批量删除处理页面
<?php
$attr = array();//定义一个空的数组
if(!empty($_POST["sc"]))//如果不为空
{
$attr = ($_POST["sc"]);//去选定的值
}
$db = new MySQLi("localhost","root","666","text1");
$str = implode("','",$attr);
$sql = "delete from info where code in('{$str}')"; $db->query($sql); /*foreach($attr as $v)//这种遍历方法会增加运算量，不如上面的方法简单。
{
$db = new MySQLi("localhost","root","666","text1");
$sql = "delete from info where code='{$v}'";
$db->query($sql);//调用$sql
}*/
header("location:main.php");
3.做一个批量删除的按钮，点击可以让所有的为选中状态或者非选中状态，用JS做，处理页面不变。
<!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>
<?php
//先判断有没有提交值
$xxm = "";
$tj = " 1=1 ";
$tj2 = " 1=1 ";//再做一个条件
if(!empty($_POST["xm"]) && $_POST["xm"]!="")//这个条件是判断xm的，判断模糊查询。
{
$xxm = $_POST['xm'];
$tj = " name like '%{$_POST['xm']}%' ";
} if(!empty($_POST["mz"]) && $_POST["mz"]!="")//再做一个条件判断另一个条件
{
$mz = $_POST['mz'];//取民族的代号
$tj2 = " nation = '{$_POST['mz']}' ";
}
?>
<br />
<form action="main.php" method="post">
<div>姓名：
<input type="text" name="xm" value="<?php echo $xxm ?>" />
民族代号：
<input type="text" name="mz" />
<input type="submit" value="查询" />
</div>
</form>
<br />
<form action="piliangshanchu.php" method="post">
<table width="100%" border="1" cellpadding="0" cellspacing="0">
<tr>
<td><input type="checkbox" onclick="quanxuan(this)" />代号</td><!--在代号里面做一个全选按钮,再做一个quanxuan方法，传一个this过去-->
<td>姓名</td>
<td>性别</td>
<td>民族</td>
<td>生日</td>
<td>操作</td>
</tr>
<?php
$db = new MySQLi("localhost","root","666","text1");
$sql = "select * from info where ".$tj." and ".$tj2;
$result = $db->query($sql);
$attr = $result->fetch_all();
foreach($attr as $v)
{
echo"<tr>";
$sex = $v[2]?"男":"女";
$name = NationName($v[3]);
$newname = str_replace($xxm,"<mark>{$xxm}</mark>",$v[1]);//替换关键字
echo"<td><input type='checkbox' value='{$v[0]}' name='sc[]' class='qx' />{$v[0]}</td><td>{$newname}</td><td>{$sex}</td><td>{$name}</td><td>{$v[4]}</td><td><a href='shanchu.php?c={$v[0]}' onclick=\"return confirm('确定删除吗？')\">删除</a><a href='xiugai.php?c={$v[0]}'>修改</a></td";
//加一个class='qx';
/*foreach($v as $v1)
{
echo "<td>{$v1}</td>";
}*/
echo"</tr>";
}
function NationName($code)
{
$db = new MySQLi("localhost","root","666","text1");
$sql = "select name from nation where code = '{$code}'";
$result = $db->query($sql);
$attr = $result->fetch_row();
return $attr[0];
}
?>
</table>
<a href="add.php"><input type="button" value="添加数据" /></a>
<input type="submit" value="批量删除" onclick="return confirm('确定删除吗？')" />
</form>
<script type="text/javascript">
function quanxuan(a)
{
//找到下面所有的复选框
var ck =document.getElementsByClassName("qx"); //遍历所有复选框，设置选中状态。
for(var i=0;i<ck.length;i++)
{
if(a.checked)//判断全选按钮的状态是不是选中的
{
ck[i].setAttribute("checked","checked");//如果是选中的，就让所有的状态为选中。
}
else
{
ck[i].removeAttribute("checked");//如果不是选中的，就移除所有的状态是checked的选项。
}
}
}
</script>
</body>
</html>