# Mysqlnd user handler plugin

- Introduction
- Quickstart and Examples
  - Setup
  - How it works
  - Installing a proxy
  - Basic query monitoring
- Installing/Configuring
  - Requirements
  - Installation
  - Runtime Configuration
  - Resource Types
- Predefined Constants
- MysqlndUhConnection — The MysqlndUhConnection class
  - MysqlndUhConnection::changeUser — Changes the user of the specified mysqlnd database connection
  - MysqlndUhConnection::charsetName — Returns the default character set for the database connection
  - MysqlndUhConnection::close — Closes a previously opened database connection
  - MysqlndUhConnection::connect — Open a new connection to the MySQL server
  - MysqlndUhConnection::__construct — The __construct purpose
  - MysqlndUhConnection::endPSession — End a persistent connection
  - MysqlndUhConnection::escapeString — Escapes special characters in a string for use in an SQL statement, taking into account the current charset of the connection
  - MysqlndUhConnection::getAffectedRows — Gets the number of affected rows in a previous MySQL operation
  - MysqlndUhConnection::getErrorNumber — Returns the error code for the most recent function call
  - MysqlndUhConnection::getErrorString — Returns a string description of the last error
  - MysqlndUhConnection::getFieldCount — Returns the number of columns for the most recent query
  - MysqlndUhConnection::getHostInformation — Returns a string representing the type of connection used
  - MysqlndUhConnection::getLastInsertId — Returns the auto generated id used in the last query
  - MysqlndUhConnection::getLastMessage — Retrieves information about the most recently executed query
  - MysqlndUhConnection::getProtocolInformation — Returns the version of the MySQL protocol used
  - MysqlndUhConnection::getServerInformation — Returns the version of the MySQL server
  - MysqlndUhConnection::getServerStatistics — Gets the current system status
  - MysqlndUhConnection::getServerVersion — Returns the version of the MySQL server as an integer
  - MysqlndUhConnection::getSqlstate — Returns the SQLSTATE error from previous MySQL operation
  - MysqlndUhConnection::getStatistics — Returns statistics about the client connection
  - MysqlndUhConnection::getThreadId — Returns the thread ID for the current connection
  - MysqlndUhConnection::getWarningCount — Returns the number of warnings from the last query for the given link
  - MysqlndUhConnection::init — Initialize mysqlnd connection
  - MysqlndUhConnection::killConnection — Asks the server to kill a MySQL thread
  - MysqlndUhConnection::listFields — List MySQL table fields
  - MysqlndUhConnection::listMethod — Wrapper for assorted list commands
  - MysqlndUhConnection::moreResults — Check if there are any more query results from a multi query
  - MysqlndUhConnection::nextResult — Prepare next result from multi_query
  - MysqlndUhConnection::ping — Pings a server connection, or tries to reconnect if the connection has gone down
  - MysqlndUhConnection::query — Performs a query on the database
  - MysqlndUhConnection::queryReadResultsetHeader — Read a result set header
  - MysqlndUhConnection::reapQuery — Get result from async query
  - MysqlndUhConnection::refreshServer — Flush or reset tables and caches
  - MysqlndUhConnection::restartPSession — Restart a persistent mysqlnd connection
  - MysqlndUhConnection::selectDb — Selects the default database for database queries
  - MysqlndUhConnection::sendClose — Sends a close command to MySQL
  - MysqlndUhConnection::sendQuery — Sends a query to MySQL
  - MysqlndUhConnection::serverDumpDebugInformation — Dump debugging information into the log for the MySQL server
  - MysqlndUhConnection::setAutocommit — Turns on or off auto-committing database modifications
  - MysqlndUhConnection::setCharset — Sets the default client character set
  - MysqlndUhConnection::setClientOption — Sets a client option
  - MysqlndUhConnection::setServerOption — Sets a server option
  - MysqlndUhConnection::shutdownServer — The shutdownServer purpose
  - MysqlndUhConnection::simpleCommand — Sends a basic COM_* command
  - MysqlndUhConnection::simpleCommandHandleResponse — Process a response for a basic COM_* command send to the client
  - MysqlndUhConnection::sslSet — Used for establishing secure connections using SSL
  - MysqlndUhConnection::stmtInit — Initializes a statement and returns a resource for use with mysqli_statement::prepare
  - MysqlndUhConnection::storeResult — Transfers a result set from the last query
  - MysqlndUhConnection::txCommit — Commits the current transaction
  - MysqlndUhConnection::txRollback — Rolls back current transaction
  - MysqlndUhConnection::useResult — Initiate a result set retrieval
- MysqlndUhPreparedStatement — The MysqlndUhPreparedStatement class
  - MysqlndUhPreparedStatement::__construct — The __construct purpose
  - MysqlndUhPreparedStatement::execute — Executes a prepared Query
  - MysqlndUhPreparedStatement::prepare — Prepare an SQL statement for execution
- Mysqlnd_uh Functions
  - mysqlnd_uh_convert_to_mysqlnd — Converts a MySQL connection handle into a mysqlnd connection handle
  - mysqlnd_uh_set_connection_proxy — Installs a proxy for mysqlnd connections
  - mysqlnd_uh_set_statement_proxy — Installs a proxy for mysqlnd statements
- Change History
  - PECL/mysqlnd_uh 1.0 series