Support us and view this ad

可选：点击以支持我们的网站

免费文章

Bluetooth technology continues to evolve, enhancing wireless communication across devices. Here's a structured overview of recent updates and future directions:  1. Recent Bluetooth Versions- **Bluetooth 5.2 (2020)**: - Introduced **LE Audio** with the **LC3 codec**, offering superior sound quality at lower bitrates, reducing power consumption. - **Enhanced Attribute Protocol (EATT)** for improved concurrent data handling, enhancing IoT and multi-device connectivity. - **Bluetooth 5.3 (2021)**: - Focused on **connection reliability** and reduced latency for smoother audio and gaming experiences. - Enhanced power efficiency for Low Energy (BLE) devices, extending battery life in wearables and sensors. - **Bluetooth 5.4 (2023)**: - **Periodic Advertising with Responses (PAwR)**: Enables efficient bidirectional communication in large-scale networks (e.g., smart factories, asset tracking)....

继续阅读完整内容

支持我们的网站，请点击查看下方广告

正在加载广告...
广告收入帮助我们持续提供免费优质内容
FaLang translation system by Faboba

Login

mysqli object is already closed (500 Whoops, looks like something went wrong.)

Error

HTTP 500 Whoops, looks like something went wrong.

mysqli object is already closed

Exception

Error

in /var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php (line 318)
  1. */
  2. public function disconnect()
  3. {
  4. // Close the connection.
  5. if (\is_callable([$this->connection, 'close'])) {
  6. $this->connection->close();
  7. }
  9. parent::disconnect();
  10. }
in /var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php -> close (line 318)
  1. */
  2. public function disconnect()
  3. {
  4. // Close the connection.
  5. if (\is_callable([$this->connection, 'close'])) {
  6. $this->connection->close();
  7. }
  9. parent::disconnect();
  10. }
in /var/www/html/libraries/vendor/joomla/database/src/DatabaseDriver.php -> disconnect (line 496)
  1. *
  2. * @since 2.0.0
  3. */
  4. public function __destruct()
  5. {
  6. $this->disconnect();
  7. }
  9. /**
  10. * Alter database's character set.
  11. *
DatabaseDriver->__destruct()

Stack Trace

Error 
Error:
mysqli object is already closed

  at /var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:318
  at mysqli->close()
     (/var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:318)
  at Joomla\Database\Mysqli\MysqliDriver->disconnect()
     (/var/www/html/libraries/vendor/joomla/database/src/DatabaseDriver.php:496)
  at Joomla\Database\DatabaseDriver->__destruct()