app连接mysql数据库文件位置

$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database_name";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检测连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

import pymysql

# 打开数据库连接
db = pymysql.connect(host="localhost", user="your_username", password="your_password", database="your_database_name")

# 使用cursor()方法创建一个游标对象
cursor = db.cursor()

# 执行SQL语句
cursor.execute("SELECT VERSION()")

# 获取一条数据
data = cursor.fetchone()

# 输出结果
print("MySQL版本：%s" % data)

# 关闭游标和数据库连接
cursor.close()
db.close()