PHP如何将HTML实体转换为相应的字符

echo ''.$number.'';数据为空处理 if (mysqli_num_rows($result) === 0) { echo '暂无数据';}性能优化对于大量数据，考虑分页或延迟加载。完整示例（带样式）<?phpheader("Content-type: text/html; charset=utf-8");$pdo = new PDO("mysql:host=localhost;dbname=lis...