Hàm MySQL của PHP
Giới thiệu PHP MySQLi
Các chức năng MySQLi cho phép bạn truy cập các máy chủ cơ sở dữ liệu MySQL.
Lưu ý: Tiện ích mở rộng MySQLi được thiết kế để hoạt động với MySQL phiên bản 4.1.13 trở lên.
Cấu hình cài đặt / thời gian chạy
Để có thể sử dụng các hàm MySQLi, bạn phải biên dịch PHP có hỗ trợ phần mở rộng MySQLi.
Tiện ích mở rộng MySQLi được giới thiệu cùng với PHP phiên bản 5.0.0. Trình điều khiển gốc MySQL đã được bao gồm trong phiên bản PHP 5.3.0.
Để biết chi tiết cài đặt, hãy truy cập: https://php.net/manual/en/mysqli.installation.php
Để biết chi tiết cấu hình thời gian chạy, hãy truy cập: https://php.net/manual/en/mysqli.configuration.php
Hàm PHP MySQLi
| Function | Description |
|---|---|
| affected_rows() | Returns the number of affected rows in the previous MySQL operation |
| autocommit() | Turns on or off auto-committing database modifications |
| begin_transaction() | Starts a transaction |
| change_user() | Changes the user of the specified database connection |
| character_set_name() | Returns the default character set for the database connection |
| close() | Closes a previously opened database connection |
| commit() | Commits the current transaction |
| connect() | Opens a new connection to the MySQL server |
| connect_errno() | Returns the error code from the last connection error |
| connect_error() | Returns the error description from the last connection error |
| data_seek() | Adjusts the result pointer to an arbitrary row in the result-set |
| debug() | Performs debugging operations |
| dump_debug_info() | Dumps debugging info into the log |
| errno() | Returns the last error code for the most recent function call |
| error() | Returns the last error description for the most recent function call |
| error_list() | Returns a list of errors for the most recent function call |
| fetch_all() | Fetches all result rows as an associative array, a numeric array, or both |
| fetch_array() | Fetches a result row as an associative, a numeric array, or both |
| fetch_assoc() | Fetches a result row as an associative array |
| fetch_field() | Returns the next field in the result-set, as an object |
| fetch_field_direct() | Returns meta-data for a single field in the result-set, as an object |
| fetch_fields() | Returns an array of objects that represent the fields in a result-set |
| fetch_lengths() | Returns the lengths of the columns of the current row in the result-set |
| fetch_object() | Returns the current row of a result-set, as an object |
| fetch_row() | Fetches one row from a result-set and returns it as an enumerated array |
| field_count() | Returns the number of columns for the most recent query |
| field_seek() | Sets the field cursor to the given field offset |
| get_charset() | Returns a character set object |
| get_client_info() | Returns the MySQL client library version |
| get_client_stats() | Returns statistics about client per-process |
| get_client_version() | Returns the MySQL client library version as an integer |
| get_connection_stats() | Returns statistics about the client connection |
| get_host_info() | Returns the MySQL server hostname and the connection type |
| get_proto_info() | Returns the MySQL protocol version |
| get_server_info() | Returns the MySQL server version |
| get_server_version() | Returns the MySQL server version as an integer |
| info() | Returns information about the last executed query |
| init() | Initializes MySQLi and returns a resource for use with real_connect() |
| insert_id() | Returns the auto-generated id from the last query |
| kill() | Asks the server to kill a MySQL thread |
| more_results() | Checks if there are more results from a multi query |
| multi_query() | Performs one or more queries on the database |
| next_result() | Prepares the next result-set from multi_query() |
| options() | Sets extra connect options and affect behavior for a connection |
| ping() | Pings a server connection, or tries to reconnect if the connection has gone down |
| poll() | Polls connections |
| prepare() | Prepares an SQL statement for execution |
| query() | Performs a query against a database |
| real_connect() | Opens a new connection to the MySQL server |
| real_escape_string() | Escapes special characters in a string for use in an SQL statement |
| real_query() | Executes a single SQL query |
| reap_async_query() | Returns result from an async SQL query |
| refresh() | Refreshes/flushes tables or caches, or resets the replication server information |
| rollback() | Rolls back the current transaction for the database |
| select_db() | Select the default database for database queries |
| set_charset() | Sets the default client character set |
| set_local_infile_default() | Unsets user defined handler for load local infile command |
| set_local_infile_handler() | Set callback function for LOAD DATA LOCAL INFILE command |
| sqlstate() | Returns the SQLSTATE error code for the error |
| ssl_set() | Used to establish secure connections using SSL |
| stat() | Returns the current system status |
| stmt_init() | Initializes a statement and returns an object for use with stmt_prepare() |
| store_result() | Transfers a result-set from the last query |
| thread_id() | Returns the thread ID for the current connection |
| thread_safe() | Returns whether the client library is compiled as thread-safe |
| use_result() | Initiates the retrieval of a result-set from the last query executed |
| warning_count() | Returns the number of warnings from the last query in the connection |
