用php写一个学生信息管理系统的完整代码
时间: 2024-06-14 10:03:42 浏览: 16
```php
// 这里是一个简单的学生信息管理系统的PHP代码示例
// 连接到MySQL数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";
$conn = new mysqli($servername, $username, $password, $dbname);
// 检查连接
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
// 创建学生信息表
$sql = "CREATE TABLE Students (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
)";
if ($conn->query($sql) === TRUE) {
echo "Table Students created successfully";
} else {
echo "Error creating table: " . $conn->error;
}
// 插入学生信息
$sql = "INSERT INTO Students (firstname, lastname, email)
VALUES ('John', 'Doe', 'john@example.com')";
if ($conn->query($sql) === TRUE) {
echo "New record created successfully";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}
// 查询学生信息
$sql = "SELECT id, firstname, lastname FROM Students";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// 输出数据
while($row = $result->fetch_assoc()) {
echo "id: " . $row["id"]. " - Name: " . $row["firstname"]. " " . $row["lastname"]. "<br>";
}
} else {
echo "0 results";
}
// 关闭数据库连接
$conn->close();
```
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