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  • PHP数据库的增删改

    主页

    <!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]}' onclick="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" />&nbsp;
        <input type="radio" name="sex" value="0" /></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'":"" ?> />&nbsp;
        <input type="radio" name="sex" value="0" <?php echo $ainfo[2]?"":"checked='checked'" ?> /></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");
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  • 原文地址:https://www.cnblogs.com/ysdong/p/6018159.html
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