php访问数据库案例 - hq金水

1、通过php向数据库添加记录

当前页面：

<form action="chuli.php" method="post">
<div>代号:<input type="text" name="code"/></div>
<div>姓名:<input type="text"  name="name"/></div>
<div>民族:<input  type="text" name="nation"/></div>
<input  type="submit"  value="提交"/>
</form>

php处理页面：

<?php
$a=$_POST["code"];
$b=$_POST["name"];
$c=$_POST["nation"];

@$connect=mysql_connect("localhost","root","123");
mysql_select_db("nation",$connect);
$sql="insert into nation values(\'{$a}\',\'{$b}\',\'{$c}\')";
$result=mysql_query($sql);//执行sql语句返回结果集，如果是增删改返回bool型
if($result)
    {
        header("location:14.php");//返回初始页面
        
    }
else
    {
        echo "添加失败";
    }
?>

2、下拉列表

<select>
<?php
$connect=mysql_connect("localhost","root","123");
mysql_select_db("nation",$connect);
$sql="select nation from nation";
$result=mysql_query($sql);
while($attr=mysql_fetch_row($result))
{
    echo "<option>$attr[0]</option>";
}
?>
</select>

3、删除

实现如下效果，点击删除消失当前记录。

 

代码如下:

当前页面

<h1 align="center">民族表</h1>
<table border="1" cellpadding="0" cellspacing="0" width="100%">
<tr>
<th>代号</th>
<th>姓名</th>
<th>民族</th>
<th>操作</th>
</tr> 
<?php
$connect=@mysql_connect("localhost","root","123");
mysql_select_db("nation",$connect);
$sql="select * from nation";
$result=mysql_query($sql);
while($attr=mysql_fetch_row($result))
{
    echo 
    "<tr>
    <td align=\'center\'>$attr[0]</td>
    <td align=\'center\'>$attr[1]</td>
    <td align=\'center\'>$attr[2]</td>
    <td align=\'center\'><a href=\'delete.php?code={$attr[0]}\'>删除</a></td>
    </tr>";
}//重点是<a href=\'delete.php?code={$attr[0]}\'>删除</a>
?>
</table>

删除页面:

<?php
$code=$_GET["code"];//重点
$connect=@mysql_connect("localhost","root","123");
mysql_select_db("nation",$connect);
$sql="delete from nation where code=\'{$code}\'";
$result=mysql_query($sql);
if($result)
    {
    header("location:15.php");
    }
else{
    echo "删除失败";
    }
?>

备注：<a href=\'zhuye.php\' onclick=\"return confirm(\'确定吗\')\">{$attr[4]}</a>//返回true或false给<a>标签，不加return是不可以的。