PHP development student management system to modify student information
Create edit.php and modify the file
Read the information in the database in the specified format and make corresponding modifications (using HTML and PHP), and then store the new data in the database
The code is as follows
edit.php file code
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>学生管理系统</title>
</head>
<body>
<?php include ('menu.php');
//1. 链接数据库
header("content-type:text/html;charset=utf8");
$conn=mysqli_connect("localhost","root","root","study");
mysqli_set_charset($conn,"utf8");
$id=$_GET['id'];
//2.执行sql
$sql_select = "select * from stu where id='$id'";
$stmt = mysqli_query($conn,$sql_select);
// var_dump($stmt);
// die();
if ($stmt>0) {
$stu = mysqli_fetch_assoc($stmt); // 解析数据
}else{
die("no have this id:{$_GET['id']}");
}
?>
<h3>修改学生信息</h3>
<form action="action.php?action=edit" method="post">
<input type="hidden" name="id" value="<?php echo $stu['id'];?>">
<table>
<tr>
<td>姓名</td>
<td><input type="text" name="name" value="<?php echo $stu['name'];?>"></td>
</tr>
<tr>
<td>年龄</td>
<td><input type="text" name="age" value="<?php echo $stu['age'];?>"></td>
</tr>
<tr>
<td>性别</td>
<td>
<input type="radio" name="sex" value="男" <?php echo ($stu['sex'] == "男")? "checked":"";?> >男
</td>
<td>
<input type="radio" name="sex" value="女" <?php echo ($stu['sex'] == "女")? "checked":"";?> >女
</td>
</tr>
<tr>
<td>班级</td>
<td><input type="text" name="class" value="<?php echo $stu['class']?>"></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" value="修改"></td>
<td><input type="reset" value="重置"></td>
</tr>
</table>
</form>
</body>
</html>Resubmit the modified data on the modified page to the database
The code is as follows
<?php
header("content-type:text/html;charset=utf8");
$conn=mysqli_connect("localhost","root","root","study");
mysqli_set_charset($conn,"utf8");
$id = $_POST['id'];
$name = $_POST['name'];
$age = $_POST['age'];
$class = $_POST['class'];
$sex = $_POST['sex'];
$sql = "update stu set name='$name', age='$age',sex='$sex',class='$class' where id='$id';";
$rw = mysqli_query($conn,$sql);
if ($rw > 0){
echo "<script>alert('修改成功');</script>";
}else{
echo "<script>alert('修改失败');</script>";
}
header('Location: index.php');
?>This completes our modification function. The next step is our delete function
new file
<body>
<meta charset="UTF-8">
<title>登陆界面</title>
<h2>学生管理系统</h2>
<a href="index.php"> 浏览学生</a>
<a href="add.php"> 添加学生</a>
<hr>
<h3>修改学生信息</h3>
<form action="action.php?action=edit" method="post">
<input name="id" value="3" type="hidden">
<table>
<tbody><tr>
<td>姓名</td>
<td><input name="name" value="刘奇" type="text"></td>
</tr>
<tr>
<td>年龄</td>
<td><input name="age" value="12" type="text"></td>
</tr>
<tr>
<td>性别</td>
<td>
<input name="sex" value="男" checked="" type="radio">男
</td>
<td>
<input name="sex" value="女" type="radio">女
</td>
</tr>
<tr>
<td>班级</td>
<td><input name="class" value="五年级" type="text"></td>
</tr>
<tr>
<td> </td>
<td><input value="修改" type="submit"></td>
<td><input value="重置" type="reset"></td>
</tr>
</tbody></table>
</form>
</body>
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