zoukankan      html  css  js  c++  java
  • 修改

    上一篇,我们讲了一张表如何删除和添加数据,下面讲一下如何修改一张表

    还是使用那张水果表,多加上一列,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>
    <h1>水果表</h1>
    <table width="100%" border="1" cellpadding="0" cellspacing="0">
    <tr>
            <td>代号</td>
            <td>名称</td>
            <td>价格</td>
            <td>产地</td>
            <td>库存</td>
            <td>操作</td>
    </tr>
     <?php
        //造连接对象
        $db = new MySQLi("localhost","root","726","text11");
        //写SQL语句
        $sql = "select * from fruit";
        
        //执行
        $result = $db->query($sql);
        
        //取数据
        /*$attr = $result->fetch_all();
        
        foreach($attr as $v)
        {
            echo "<tr><td>{$v[0]}</td><td>{$v[1]}</td><td>{$v[2]}</td><td>{$v[3]}</td><td>{$v[4]}</td></tr>";
        }*/         
        
        while($attr = $result->fetch_row())
        {
            echo "<tr><td>{$attr[0]}</td><td>{$attr[1]}</td><td>{$attr[2]}</td><td>{$attr[3]}</td><td>{$attr[4]}</td><td>
            
            <a href='shanchu.php?code={$attr[0]}' onclick="return confirm('确定删除么')">
            删除
            </a>
            <a href='xiugai.php?code={$attr[0]}'>修改</a>      
            </td></tr>";
        }
        //上述显示数据的两种方法都可以用  
        
        ?> 
    </table>
    
    <a href="tianjia.php">添加数据</a>
    </body>
    <script type="text/javascript">
    
    </script>
    </html>

    使用的a 标签,href地址是xiugai.php    也就是说待会得新建一个网页,根据索引来修改

    这样后面就多了一个修改列:

    点击修改,它会自动跳转到xiugai.php页面

    建一个新的页面,里面就要写xiugai.php  的内容了

    <!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>
    <h1>修改水果</h1>
    <?php
    $code = $_GET["code"];
    //造连接对象
    $db = new MySQLi("localhost","root","726","text11");
    //写SQL语句
    $sql = "select * from fruit where ids='{$code}'";
    //执行
    $result =$db->query($sql);
    //取数据
    $attr = $result->fetch_row();
    
    
    
    ?>
    <form action="xiugaichuli.php" method="post">
    <input type="hidden" name="ids" value="<?php echo $attr[0] ?>" />   
    <div>名称:<input type="text" name="name" value="<?php echo $attr[1] ?>"/></div>
    <div>价格:<input type="text" name="price" value="<?php echo $attr[2] ?>"/></div>
    <div>产地:<input type="text" name="source" value="<?php echo $attr[3] ?>"/></div>
    <div>库存:<input type="text" name="numbers" value="<?php echo $attr[4] ?>"/></div>
    <div><input type="submit" name="修改" /></div>
    </form>
    
    </body>
    </html>

    显示的是原先默认的值

    可以在这个基础上改

    点击提交后还要把这些数据提交到一个页面,xiugaichuli.php

    所以再建一个网页

    <?php
    $ids = $_POST["ids"];
    $name = $_POST["name"];
    $price = $_POST["price"];
    $source = $_POST["source"];
    $numbers = $_POST["numbers"];
    //造连接对象
    $db = new MySQLi("localhost","root","726","text11");
    //写SQL语句
    $sql = "update fruit set name='{$name}',price='{$price}',source='{$source}',numbers='{$numbers}' where ids='{$ids}'";
    //执行
    $r=$db->query($sql);
    if($r)
    {
        header("location:shuiguobiao1.php");
        }
    else
    {
        echo "修改失败!";
        }

    修改成功的话直接返回水果表

    来看一下,能否修改成功?

     

    显然成功了

    下面再来写两张表,一张主表一张从表,有外键关系的两张表

    一张info表

    一张nation表

    做个info表的网页

    <!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
    $db = new MySQLi("localhost","root","726","shuang");
    $sql = "select * from info";
    $result = $db->query($sql);
    $attr=$result->fetch_all();
    foreach($attr as $v)
    {
        $sex = $v[2];
        $sex = $sex?"男":"女";     //性别改成汉字
        $nation = $v[3];
        $sqln = "select name from nation where code='{$nation}'";     //显示民族
        $rn = $db->query($sqln);
        $an = $rn->fetch_row();
        echo "<tr><td>{$v[0]}</td><td>{$v[1]}</td><td>{$sex}</td><td>{$an[0]}</td><td>{$v[4]}</td><td><a href='xiugaiinfo.php?code={$v[0]}'>修改</a></td></tr>";
        
        
        }
    ?>
    </body>
    </html>

    运行起来是这样的一张表:

    点击修改会跳转到xiugaiinfo.php  的页面,所以要建一个修改页面

    <!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["code"];
    $db = new MySQLi("localhost","root","726","shuang");
    $sql = "select * from info where code='{$code}'";
    
    $result = $db->query($sql);
    $attr = $result->fetch_row();
    ?>
    <h1>修改人员信息</h1>
    <form action="infochuli.php" method="post">
    <div>
      <input type="hidden" value="<?php echo $attr[0]
      ?>" name="code" />
    </div>
    <div>
      姓名:
      <input type="text" name="name" value="<?php echo $attr[1]
      ?>" />
    </div>
    <div>
      性别:
      <input <?php echo $attr[2]?"checked='checked'":
      ""; ?>type="radio" name="sex" value="1" /><input <?php echo $attr[2]?"checked='checked'":
      ""; ?>type="radio" name="sex" value="0" /></div>
    <div>
      民族:
     <select name="nation">
     <?php
     $sqln = "select * from nation";
     $rn = $db->query($sqln);
     $an = $rn->fetch_all();
     foreach ($an as $vn)
     {   if($attr[3]==$vn[0])
         {
             echo "<option selected='selected' 
             value='{$vn[0]}'>{$vn[1]}</option>";
             
         }
         else
         {
         echo "<option value='{$vn[0]}'>{$vn[1]}</option>";
         }
     }
     
     ?>
     </select>
    </div>
    <div>
      生日:
      <input type="text" name="birthday" value="<?php echo $attr[4]
      ?>" />
    </div>
    <div>
      <input type="submit" value="修改" />
    </div>
    </form>
    </body>
    </html>

    把原先的数据设为默认值,在这个基础上改

    最后点击修改跳转到infochuli.php

    所以要建一个infochuli.php的页面

    <?php
    $code = $_POST["code"];
    $name = $_POST["name"];
    $sex = $_POST["sex"];
    $nation = $_POST["nation"];
    $birthbay = $_POST["birthday"];
    $db = new MySQLi("localhost","root","726","shuang");
    $sql = "update info set name='{$name}',sex={$sex},nation='{$nation}',birthday='{$birthbay}' where code='{$code}'";
    echo $sql;
    $r = $db->query($sql);
    if($r)
    {
        header("location:info.php");
        }
    else
    {
        echo "修改失败!";
        }

    如果修改成功的话它会返回info.php页面

    来看一下能否修改成功

    修改成功了!

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  • 原文地址:https://www.cnblogs.com/qishuang/p/6204088.html
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