根据数据库值有条件地显示按钮

// 假设使用JavaScript和MySQL数据库

// 连接数据库
const mysql = require('mysql');
const connection = mysql.createConnection({
  host: 'localhost',
  user: 'username',
  password: 'password',
  database: 'database_name'
});

// 查询数据库
const query = 'SELECT button_visibility FROM table_name WHERE condition = "some_value"';
connection.query(query, (error, results) => {
  if (error) throw error;

  // 解析查询结果
  const buttonVisibility = results[0].button_visibility;

  // 控制按钮可见性
  const button = document.getElementById('button_id');
  if (buttonVisibility === 'visible') {
    button.style.display = 'block';
  } else {
    button.style.display = 'none';
  }
});