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php数据库增删改查

2018-06-22 05:29:39来源：未知阅读 ()

首先建立一个数据库db_0808，将db_0808中表格student导入网页。

CURD.php

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Title</title>
</head>
<body>
<?php
$db = new Mysqli("localhost","root","root","db_0808");
//!$db?"":die("链接错误");
empty(mysqli_connect_error())?"":die("链接错误");
$sql = "select * from student where is_delete='0'";
//$data = $db->query($sql)->fetch_all();//索引数组形式的所有数据

?>
<table border="1">
    <tr>
        <td>id</td>
        <td>名字</td>
        <td>性别</td>
        <td>班级</td>
        <td>生日</td>
        <td>操作</td>
    </tr>
    <?php
    $result=$db->query($sql);
    while ($data=$result->fetch_row()){  //索引数组形式的第一条数据
//    foreach ($data as $i){
        if ($data[2]==1){
            $data[2]="男";
        }else if ($data[2]==0){
            $data[2]="女";
        }else{
            $data[2]="保密";
        }
        echo "<tr>
                 <td>{$data[0]}</td>
                 <td>{$data[1]}</td>
                 <td>{$data[2]}</td>
                 <td>{$data[3]}</td>
                 <td>{$data[4]}</td>
                 <td><a href='delete.php?id={$data[0]}'>删除</a>
                     <a href='xiugai.php?id={$data[0]}'>修改</a>
                 </td>
              </tr>";
    }

    ?>
</table>
<a href="add.php">新增用户</a>
</body>
</html>

向数据库中添加新信息add.php

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form method="post" action="addpost.php">
    <input type="text" name="name" placeholder="姓名">
    <input type="radio" name="sex" value="1" id="man"><label for="man">男</label>
    <input type="radio" name="sex" value="0" id="nv"><label for="nv">女</label>
    <input type="text" name="banji" placeholder="班级">
<!--    <input type="text" name="age" placeholder="年龄">-->
    <input type="text" name="birthday" placeholder="出生年月">
    <input type="submit" value="提交">
</form>
</body>
</html>

对add.php信息处理addpost.php

<?php
/**
 * Created by fcc
 * User: Administrator
 * Date: 2017/10/13
 * Time: 15:49
 */
$name = $_POST['name'];
//var_dump($name);
$sex = $_POST['sex'];
$ban=$_POST['banji'];
//$age = $_POST['age'];
$birthday = $_POST['birthday'];

$db=new Mysqli("localhost","root","root","db_0808");
$sql = "INSERT INTO student VALUES (null,'{$name}',{$sex},{$ban},'{$birthday}',DEFAULT,null)";
if ($db->query($sql)){
header("location:CURD.php");
}else{
    header("location:add.php");
}

添加信息成功

删除信息delete.php

<?php
/**
 * Created by fcc
 * User: Administrator
 * Date: 2017/10/14
 * Time: 10:56
 */
$id=$_GET['id'];
$db=new Mysqli("localhost","root","root","db_0808");
empty(mysqli_connect_error())?"":die("链接错误");
//$sql="DELETE FROM student WHERE Sno='{$id}'";//彻底删除，数据库中内容删除

$sql = "update student set is_delete = '1' where Sno= '{$id}'";//表面删除,数据库中内容仍存在
if ($db->query($sql)){
    header("location:CURD.php");
};

更改信息页面xiugai.php

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<?php
$s = null;
if(isset($_GET['id'])){
    $id = $_GET['id'];
require_once "../t/DBDA.class.php";
//    $db=new Mysqli("localhost","root","root","db_0808");
//    empty(Mysqli_connect_error())?"":die("连接错误");
    $db = new DBDA();
    $sql="select * from student where Sno='{$id}'";
    //二维数组，输出方法$r[0][0]
    $r = $db->Query($sql);
    $s = $r[0];
//    $r=$db->query($sql);
////var_dump($r);
//  fetch_row 索引数组
//    $s=$r->fetch_row();
}

?>

<form method="post" action="xiugaichuli.php"> <input type="hidden" name="id" value="<?php echo $s[0]?>"> <input type="text" name="name" placeholder="<?php echo $s[1]?>"> <input type="radio" name="sex" value="0" <?php echo $s[2]?"":"checked='checked'"; ?> id="nv"><label for="nv">女</label> <input type="radio" name="sex" value="1" <?php echo $s[2]?"checked='checked'":""; ?> id="nan"><label for="nan">男</label> <input type="text" name="banji" placeholder="<?php echo $s[3]?>"> <!-- <input type="text" name="age" placeholder="年龄">--> <input type="text" name="birthday" placeholder="<?php echo $s[4]?>"> <input type="submit" value="提交"> </form> </body> </html>

更改信息处理页面xiugaichuli.php

<?php
/**
 * Created by fcc
 * User: Administrator
 * Date: 2017/10/17
 * Time: 9:07
 */
$id=$_POST['id'];
$name=$_POST['name'];
$sex=$_POST['sex'];
$banji=$_POST['banji'];
$birthday=$_POST['birthday'];
$db=new Mysqli("localhost","root","root","db_0808");
empty(Mysqli_connect_error())?"":"连接错误";
$sql="UPDATE student SET Sname='{$name}',Ssex='{$sex}',class='{$banji}',birthday='{$birthday}'WHERE Sno='{$id}'";
//var_dump($sql);
if ($db->query($sql)){
    header("location:CURD.php");
}