php数据库增删改查

时间:2022-12-11 08:52:25

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'];

$db=new Mysqli("localhost","root","root","db_0808");
empty(Mysqli_connect_error())?"":die("连接错误");
$sql="select * from student where Sno='{$id}'";

$r=$db->query($sql);
//var_dump($r);
$s=$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");
}