php访问数据库案例

<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
$a=$_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";
    }
?>