PHP简单项目案例（改进版）
最近开学php，下午闲着没事干，想着做个小项目练练手，也就是用php写个网页，对数据库里的东西实现增删改查，下面给大家分享一下，由于本人的业务能力尚浅，大家有啥建议我很欢迎哦！
简单效果：
1.打开网页呈现数据库数据：
2.删除功能，添加信息功能。
3.信息修改功能（带数据进页面）
下面便是源码：
数据库文件：（数据库名：dataphp 表名：student）
/*
SQLyog 企业版 - MySQL GUI v8.14
MySQL - 5.5.5-10.3.7-MariaDB : Database - dataphp
*********************************************************************
*/
/*!40101 SET NAMES utf8 */;
/*!40101 SET SQL_MODE=''*/;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
CREATE DATABASE /*!32312 IF NOT EXISTS*/`dataphp` /*!40100 DEFAULT CHARACTER SET utf8 */;
USE `dataphp`;
/*Table structure for table `student` */
DROP TABLE IF EXISTS `student`;
CREATE TABLE `student` (
`id` int(10) NOT NULL AUTO_INCREMENT,
`name` varchar(15) DEFAULT NULL,
`sex` char(4) DEFAULT NULL,
`address` varchar(20) DEFAULT NULL,
`hobby` varchar(30) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=19 DEFAULT CHARSET=utf8;
/*Data for the table `student` */
insert into `student`(`id`,`name`,`sex`,`address`,`hobby`) values (1,'张飞','男','河南省','游泳'),(6,'大乔','女','新疆省','游泳'),(10,'周瑜','男','陕西','游泳'),(16,'曹操','女','巴西','游泳'),(17,'张三','女','陕西','篮球');
/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
主页面：service.php
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "dataphp";
// 创建连接
$conn = mysqli_connect($servername, $username, $password,
$dbname);
// 检测连接
if (!$conn) {
die("Connectionfailed: " . mysqli_connect_error());
}
//增加业务（接收来自studeng_form.php页面传来的Post提交的参数）
if(isset($_POST["name"])&&isset($_POST["sex"])&&isset($_POST["address"])&&isset($_POST["hobby"])){
$name=$_POST["name"];
$sex=$_POST["sex"];
$address=$_POST["address"];
$hobby=$_POST["hobby"];
$hobbies=implode(",",$hobby);
$sql = "INSERT into student (name,sex,address,hobby)
VALUES ('$name','$sex','$address','$hobbies')";
if (mysqli_query($conn, $sql)) {
echo "";
} else {
echo "Error: " . $sql . "
" . mysqli_error($conn);
}
}
//修改业务（接收来自updatestudent.php页面传来的Post提交的参数）
if(isset($_POST["name2"])&&isset($_POST["sex2"])&&isset($_POST["address2"])&&isset($_POST["hobby2"])&&isset($_POST["id"])){
$id=$_POST["id"];
$name2=$_POST["name2"];
$sex2=$_POST["sex2"];
$address2=$_POST["address2"];
$hobby2=$_POST["hobby2"];
$hobbies2=implode(",",$hobby2);
$sqlupdate = "UPDATE student SET NAME='$name2',sex='$sex2',address='$address2',hobby='$hobbies2' WHERE id=$id";
if (mysqli_query($conn, $sqlupdate)) {
echo "";
header("Location: service.php"); //刷新当前页面
mysqli_close($conn);
} else {
echo "Error: " . $sqlupdate . "
" . mysqli_error($conn);
}
}
//查询，返回全部结果
$sqlselect="select * from student";
$result=mysqli_query($conn, $sqlselect);
if($result->num_rows>0){
echo "学生信息显示
";
echo "
";
echo "姓名 性别 地址 爱好 操作 '.$row["name"].'
'.$row["sex"].'
'.$row["address"].'
'.$row["hobby"].'
.$row["id"].'">删除'.' '.
'.$row["id"].'">修改
";
}else{
echo "0个结果";
}
//删除业务，接受本页面传来的id参数，利用此参数删除对应记录
if(isset($_GET["id"])){
$id=$_GET["id"];
$sqldelete='delete from student where id='.$id;
if (mysqli_query($conn, $sqldelete)) {
echo "";
mysqli_close($conn);
header("Location: service.php"); //刷新当前页面
} else {
echo "Error: " . $sqldelete . "
" . mysqli_error($conn);
}
}
echo '';
mysqli_close($conn);
?>
添加页面（由主页面跳转）student_form.php
<html>
<head>
<meta charset="utf-8">
<title>表单提交数据库</title>
</head>
<body>
<h1>添加学生信息</h1>
<div>
<form method="post" action="service.php">
姓名：<input type="text" id="input1" name="name"/><br/>
性别：
男<input type="radio" name="sex" value="男"/>
女<input type="radio" name="sex" value="女"/>
<br/>
地址：<input type="text" id="input1" name="address"/><br/>
爱好：
游泳<input type="checkbox" name="hobby[]" value="游泳"/>
篮球<input type="checkbox" name="hobby[]" value="篮球"/>
排球<input type="checkbox" name="hobby[]" value="排球"/>
<br>
<input type="submit" value="提交"/>
</form>
</div>
<style type="text/css">
h1{
background-color:#678;
color:white;
text-align:center;
}
body {
height: 100%;
width: 100%;
border: none;
overflow-x: hidden;
}
div{
width:100%;
text-align:center;
}
</style>
</body>
</html>
修改页面（由主页面跳转）updatestudent.php
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "dataphp";
// 创建连接
$conn = mysqli_connect($servername, $username, $password,
$dbname);
// 检测连接
if (!$conn) {
die("Connectionfailed: " . mysqli_connect_error());
}
//根据service修改标签点击后传来的参数id进行查询，查到的值（在html中放入对应的元素中）
if(isset($_GET["id"])){
$id=$_GET["id"];
$sqlSelectId="select * from student where id=".$id;
$result=mysqli_query($conn, $sqlSelectId);
$row=$result->fetch_assoc();
$name=$row["name"];
$sex=$row["sex"];
$address=$row["address"];
$hobby=$row["hobby"];
$hobbies=explode(",", $hobby);//将字符串按“，”，划分为数组
}
?>
<html>
<head>
<meta charset="utf-8">
<title>表单修改数据库</title>
</head>
<body>
<h1>修改信息</h1>
<div>
<form method="post" action="service.php">
姓名：<input type="text" name="name2" value="$name?>"/><br/>
性别：
男<input type="radio" id="male" name="sex2" value="男"/>
女<input type="radio" id="female" name="sex2" value="女"/>
<br/>
地址：<input type="text" name="address2" value="$address?>" /><br/>
爱好：
游泳<input type="checkbox" id="h1" name="hobby2[]" value="游泳"/>
篮球<input type="checkbox" id="h2" name="hobby2[]" value="篮球"/>
排球<input type="checkbox" id="h3" name="hobby2[]" value="排球"/>
<input type="hidden" name="id" value="$id ?>"/>
<br>
<input type="submit" value="提交"/>
</form>
</div>
<style type="text/css">
h1{
background-color:#678;
color:white;
text-align:center;
}
body {
height: 100%;
width: 100%;
border: none;
overflow-x: hidden;
}
div{
width:100%;
text-align:center;
}
</style>
if($sex=='男'){
echo "
";
}else{
echo "
";
}
for($i=0;$i<count($hobbies);$i++){
if($hobbies[$i]=='游泳'){
echo "
";
}else if($hobbies[$i]=='篮球'){
echo "
";
}else if($hobbies[$i]=='排球'){
echo "
";
}
}
?>
</body>
</html>