php数据库增删改

最新推荐文章于 2024-07-09 18:08:49 发布

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最新推荐文章于 2024-07-09 18:08:49 发布

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CC 4.0 BY-SA版权

分类专栏： PHP

本文链接：https://blog.youkuaiyun.com/weixin_43929967/article/details/84943616

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<!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>

<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
    
    //造连接对象
    $db = new  MySQLi("localhost","root","123","mydb");
    //写SQL语句
    $sql = "select * from info";
    //执行SQL语句
    $result = $db->query($sql);
    //读数据
    $attr = $result->fetch_all();
    
    foreach($attr as $v)
    {
        echo "<tr>";
        
        $sex = $v[2]?"男":"女";
        
        //根据名族代号查询名族名称
        $name = NationName($v[3]);
        
        echo "<td>{$v[0]}</td><td>{$v[1]}</td><td>{$sex}</td><td>{$name}</td><td>{$v[4]}</td><td><a href='shanchu.php?c={$v[0]}' οnclick=\"return confirm('确定删除么？')\">删除</a><a href='xiugai.php?c={$v[0]}'>修改</a></td>";
        
        /*foreach($v as $v1)
        {
            echo "<td>{$v1}</td>";
        }*/
        
        echo "</tr>";
    }
    
    //给一个民族代号，返回民族名称
    function NationName($code)
    {
        //造连接对象
        $db = new  MySQLi("localhost","root","123","mydb");
        //写SQL语句
        $sql = "select name from nation where code='{$code}'";
        //执行SQL语句
        $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>
</body>
</html>

添加

<!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>

<form action="addchuli.php" method="post">
    <div>代号：<input type="text" name="code" /></div>
    <div>姓名：<input type="text" name="name" /></div>
    <div>性别：
    <input type="radio" name="sex" value="1" checked="checked" />男
    &nbsp;
    <input type="radio" name="sex" value="0" />女
    </div>
    <div>民族：
    <select name="nation">
        <?php
        //造连接对象
        $db = new MySQLi("localhost","root","123","mydb");
        $sql = "select * from nation";
        $result = $db->query($sql);
        $attr = $result->fetch_all();
        
        foreach($attr as $v)
        {
            echo "<option value='{$v[0]}'>{$v[1]}</option>";
        }
        ?>
    </select>
    </div>
    <div>生日：<input type="text" name="birthday" /></div>
    
    <div><input type="submit" value="添加" /></div>
</form>

</body>
</html>

添加处理

<?php
$code = $_POST["code"];
$name = $_POST["name"];
$sex = $_POST["sex"];
$nation = $_POST["nation"];
$birthday = $_POST["birthday"];

//造连接对象
$db = new MySQLi("localhost","root","123","mydb");

$sql = "insert into info values('{$code}','{$name}',{$sex},'{$nation}','{$birthday}')";

$db->query($sql);

header("location:main.php");

删除

<?php
$code = $_GET["c"];

//造连接对象
$db = new MySQLi("localhost","root","123","mydb");

$sql = "delete from info where code='{$code}'";

$r = $db->query($sql);

if($r)
{
    header("location:main.php");
}
else
{
    echo "删除失败";
}

修改

<!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
    $code = $_GET["c"];
    //造连接对象
    $db = new MySQLi("localhost","root","123","mydb");
    //写SQL语句
    $sinfo = "select * from info where code='{$code}'";    

    $rinfo = $db->query($sinfo);
    
    $ainfo = $rinfo->fetch_row();
?>

<form action="xiugaichuli.php" method="post">
    <div><input type="hidden" name="code" value="<?php echo $ainfo[0]; ?>" /></div>
    <div>姓名：<input type="text" name="name" value="<?php echo $ainfo[1]; ?>" /></div>
    
    
    
    <div>性别：
    <input type="radio" name="sex" value="1" <?php echo $ainfo[2]?"checked='checked'":"" ?> />男
    &nbsp;
    <input type="radio" name="sex" value="0" <?php echo $ainfo[2]?"":"checked='checked'" ?> />女
    </div>
    
    
    
    <div>民族：
    <select name="nation">
        <?php
        
        $sql = "select * from nation";
        $result = $db->query($sql);
        $attr = $result->fetch_all();
        
        foreach($attr as $v)
        {
            if($v[0]==$ainfo[3])
            {
                echo "<option selected='selected' value='{$v[0]}'>{$v[1]}</option>";
            }
            else
            {
                echo "<option value='{$v[0]}'>{$v[1]}</option>";
            }
        }
        ?>
    </select>
    </div>
    
    
    
    <div>生日：<input type="text" name="birthday" value="<?php echo $ainfo[4]; ?>" /></div>
    
    <div><input type="submit" value="修改" /></div>
</form>



</body>
</html>

修改处理

<?php
$code = $_POST["code"];
$name = $_POST["name"];
$sex = $_POST["sex"];
$nation = $_POST["nation"];
$birthday = $_POST["birthday"];

//造连接对象
$db = new MySQLi("localhost","root","123","mydb");

$sql = "update info set name='{$name}',sex={$sex},nation='{$nation}',birthday='{$birthday}' where code='{$code}'";

$db->query($sql);

header("location:main.php");