<form action="test.PHP" method="post">
<table border="1">
<tr><input type="checkBox" name="all" onclick="checkall(this)"/>id名字</tr>

<?php show() ?>

<tr><td colspan="3"><input type="submit" value="批量删除"></td></tr>
</table>

<?PHP

//显示列表
function show()
{
//连接数据库
@MysqL_connect('localhost','root','');
MysqL_select_db('test');
MysqL_query('set names utf8');

$sql = "select id,name from test";
$res = MysqL_query($sql);

//循环取出数据
while($row = MysqL_fetch_row($res))
{
echo "<tr>
<td>

//接收post传来的数组
$arr = $_POST["item"];

/**

• 批量删除

• 思路：把前台批量选择的数据放在数组里，删除该数组即可

• @param $arr <array()>

• @return $res 成功or失败
  */
  function batch_del($arr)
  {
  @MysqL_connect('localhost','');
  MysqL_select_db('test');
  MysqL_query('set names utf8');

  //把数组元素组合为字符串：
  $str = implode("','",$arr);
  　　//in 表示多个
  $sql = "delete from test where id in('{$str}')";
  $res = MysqL_query($sql);

  if (!$res){
  echo "删除失败";
  }else {

  if (<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_affected_rows()>0){
    echo "<a href="https://www.jb51.cc/tag/shanchu/" target="_blank" class="keywords">删除</a>成功";
  }else {
    echo "没有行受到影响";  
  }

  }
  }

//调用批量删除函数

batch_del($arr);