MySQL 可应用于多种语言，包括 PERL, C, C++, JAVA 和 PHP。 在这些语言中，MySQL在PHP的web开发中是应用最广泛。 ``` mysqli — mysqli 类 mysqli::$affected_rows — Gets the number of affected rows in a previous MySQL operation mysqli::autocommit — 打开或关闭本次数据库连接的自动命令提交事务模式 mysqli::begin_transaction — Starts a transaction mysqli::change_user — Changes the user of the specified database connection mysqli::character_set_name — 返回当前数据库连接的字符编码 mysqli::close — 关闭先前打开的数据库连接 mysqli::commit — 提交当前事务 mysqli::$connect_errno — Returns the error code from last connect call mysqli::$connect_error — Returns a description of the last connection error mysqli::__construct — Open a new connection to the MySQL server mysqli::debug — Performs debugging operations mysqli::dump_debug_info — 将调试信息输出到日志 mysqli::$errno — 返回最近函数调用的错误代码 mysqli::$error_list — Returns a list of errors from the last command executed mysqli::$error — Returns a string description of the last error mysqli::execute_query — Prepares, binds parameters, and executes SQL statement mysqli::$field_count — Returns the number of columns for the most recent query mysqli::get_charset — Returns a character set object mysqli::$client_info — 获取 MySQL 客户端信息 mysqli::$client_version — 作为整数返回 MySQL 客户端的版本 mysqli::get_connection_stats — 返回客户端连接的统计数据 mysqli::$host_info — 返回表述使用的连接类型的字符串 mysqli::$protocol_version — 返回 MySQL 协议使用的版本号 mysqli::$server_info — 返回 MySQL 服务器的版本号 mysqli::$server_version — 作为一个整数返回MySQL服务器的版本 mysqli::get_warnings — Get result of SHOW WARNINGS mysqli::$info — 返回最近执行的 SQL 语句的信息 mysqli::init — 初始化 MySQLi 并返回用于 mysqli_real_connect() 的对象 mysqli::$insert_id — 返回上次查询为 AUTO_INCREMENT 列生成的值 mysqli::kill — 让服务器杀死一个 MySQL 线程 mysqli::more_results — 检查批量查询中是否还有查询结果 mysqli::multi_query — 在数据库上执行一个或多个查询 mysqli::next_result — 为读取 multi_query 执行之后的下一个结果集做准备 mysqli::options — 设置选项 mysqli::ping — ping 一个连接，或者如果连接处于断开状态，重新连接 mysqli::poll — 轮询连接 mysqli::prepare — 预处理执行 SQL mysqli::query — 对数据库执行查询 mysqli::real_connect — 建立一个 MySQL 服务器连接 mysqli::real_escape_string — 根据当前连接的字符集，对于 SQL 语句中的特殊字符进行转义 mysqli::real_query — 执行一个mysql查询 mysqli::reap_async_query — 获取异步查询的结果 mysqli::refresh — 刷新 mysqli::release_savepoint — 从当前事务的保存点中移除一个命名保存点 mysqli::rollback — 回滚当前事务 mysqli::savepoint — 在当前事务中设置命名保存点 mysqli::select_db — 选择用于数据库查询的默认数据库 mysqli::set_charset — 设置客户端字符集 mysqli::$sqlstate — 返回上一次 MySQL 操作的 SQLSTATE 错误 mysqli::ssl_set — 用于使用 SSL 建立安全连接 mysqli::stat — 获取当前系统状态信息 mysqli::stmt_init — 初始化语句并返回用于 mysqli_stmt_prepare（调用）的对象 mysqli::store_result — 传输上次查询的结果集 mysqli::$thread_id — 返回当前连接的线程 ID mysqli::thread_safe — 返回是否线程安全 mysqli::use_result — Initiate a result set retrieval mysqli::$warning_count — Returns the number of warnings from the last query for the given link mysqli_stmt — mysqli_stmt 类 mysqli_stmt::$affected_rows — Returns the total number of rows changed, deleted, inserted, or matched by the last statement executed mysqli_stmt::attr_get — Used to get the current value of a statement attribute mysqli_stmt::attr_set — Used to modify the behavior of a prepared statement mysqli_stmt::bind_param — Binds variables to a prepared statement as parameters mysqli_stmt::bind_result — Binds variables to a prepared statement for result storage mysqli_stmt::close — Closes a prepared statement mysqli_stmt::__construct — Constructs a new mysqli_stmt object mysqli_stmt::data_seek — Adjusts the result pointer to an arbitrary row in the buffered result mysqli_stmt::$errno — Returns the error code for the most recent statement call mysqli_stmt::$error_list — Returns a list of errors from the last statement executed mysqli_stmt::$error — Returns a string description for last statement error mysqli_stmt::execute — Executes a prepared statement mysqli_stmt::fetch — Fetch results from a prepared statement into the bound variables mysqli_stmt::$field_count — Returns the number of columns in the given statement mysqli_stmt::free_result — Frees stored result memory for the given statement handle mysqli_stmt::get_result — Gets a result set from a prepared statement as a mysqli_result object mysqli_stmt::get_warnings — Get result of SHOW WARNINGS mysqli_stmt::$insert_id — Get the ID generated from the previous INSERT operation mysqli_stmt::more_results — Check if there are more query results from a multiple query mysqli_stmt::next_result — Reads the next result from a multiple query mysqli_stmt::$num_rows — Returns the number of rows fetched from the server mysqli_stmt::$param_count — Returns the number of parameters for the given statement mysqli_stmt::prepare — Prepares an SQL statement for execution mysqli_stmt::reset — Resets a prepared statement mysqli_stmt::result_metadata — Returns result set metadata from a prepared statement mysqli_stmt::send_long_data — Send data in blocks mysqli_stmt::$sqlstate — Returns SQLSTATE error from previous statement operation mysqli_stmt::store_result — Stores a result set in an internal buffer mysqli_result — mysqli_result 类 mysqli_result::__construct — Constructs a mysqli_result object mysqli_result::$current_field — Get current field offset of a result pointer mysqli_result::data_seek — Adjusts the result pointer to an arbitrary row in the result mysqli_result::fetch_all — Fetch all result rows as an associative array, a numeric array, or both mysqli_result::fetch_array — Fetch the next row of a result set as an associative, a numeric array, or both mysqli_result::fetch_assoc — Fetch the next row of a result set as an associative array mysqli_result::fetch_column — Fetch a single column from the next row of a result set mysqli_result::fetch_field_direct — Fetch meta-data for a single field mysqli_result::fetch_field — Returns the next field in the result set mysqli_result::fetch_fields — Returns an array of objects representing the fields in a result set mysqli_result::fetch_object — Fetch the next row of a result set as an object mysqli_result::fetch_row — Fetch the next row of a result set as an enumerated array mysqli_result::$field_count — Gets the number of fields in the result set mysqli_result::field_seek — Set result pointer to a specified field offset mysqli_result::free — Frees the memory associated with a result mysqli_result::getIterator — Retrieve an external iterator mysqli_result::$lengths — Returns the lengths of the columns of the current row in the result set mysqli_result::$num_rows — Gets the number of rows in the result set mysqli_driver — mysqli_driver 类 mysqli_driver::embedded_server_end — Stop embedded server mysqli_driver::embedded_server_start — Initialize and start embedded server mysqli_driver::$report_mode — Sets mysqli error reporting mode mysqli_warning — mysqli_warning 类 mysqli_warning::__construct — Private constructor to disallow direct instantiation mysqli_warning::next — Fetch next warning mysqli_sql_exception — mysqli_sql_exception 类 mysqli_sql_exception::getSqlState — Returns the SQLSTATE error code ``` PHP提供了多种方式来访问和操作MySQL数据库记录。PHP Mysqli函数格式如下： ``` mysqli_function(value,value,...); ``` 以上格式中 function 部分描述了 MySQL 函数的功能，如 ``` mysqli_connect($connect); mysqli_query($connect,"SQL 语句"); mysqli_fetch_array() mysqli_close() ``` 以下实例展示了PHP调用MySQL函数的语法： ``` <?php $retval = mysqli_function(value, [value,...]); if( !$retval ){ die ( "相关错误信息" ); } // 其他 MySQL 或 PHP 语句 ?> ```