# The MySQLi Extension Function Summary

## Summary of `mysqli` methods

mysqli Class
OOP Interface | Procedural Interface | Alias (Do not use) | Description
Properties
$mysqli::affected_rows | `mysqli_affected_rows` | N/A | Gets the number of affected rows in a previous MySQL operation
$mysqli::client_info | `mysqli_get_client_info` | N/A | Returns the MySQL client version as a string
$mysqli::client_version | `mysqli_get_client_version` | N/A | Returns MySQL client version info as an integer
$mysqli::connect_errno | `mysqli_connect_errno` | N/A | Returns the error code from last connect call
$mysqli::connect_error | `mysqli_connect_error` | N/A | Returns a string description of the last connect error
$mysqli::errno | `mysqli_errno` | N/A | Returns the error code for the most recent function call
$mysqli::error | `mysqli_error` | N/A | Returns a string description of the last error
$mysqli::field_count | `mysqli_field_count` | N/A | Returns the number of columns for the most recent query
$mysqli::host_info | `mysqli_get_host_info` | N/A | Returns a string representing the type of connection used
$mysqli::protocol_version | `mysqli_get_proto_info` | N/A | Returns the version of the MySQL protocol used
$mysqli::server_info | `mysqli_get_server_info` | N/A | Returns the version of the MySQL server
$mysqli::server_version | `mysqli_get_server_version` | N/A | Returns the version of the MySQL server as an integer
$mysqli::info | `mysqli_info` | N/A | Retrieves information about the most recently executed query
$mysqli::insert_id | `mysqli_insert_id` | N/A | Returns the auto generated id used in the last query
$mysqli::sqlstate | `mysqli_sqlstate` | N/A | Returns the SQLSTATE error from previous MySQL operation
$mysqli::warning_count | `mysqli_warning_count` | N/A | Returns the number of warnings from the last query for the given link
Methods
`mysqli::autocommit` | `mysqli_autocommit` | N/A | Turns on or off auto-committing database modifications
`mysqli::change_user` | `mysqli_change_user` | N/A | Changes the user of the specified database connection
`mysqli::character_set_name` | `mysqli_character_set_name` | N/A | Returns the default character set for the database connection
`mysqli::close` | `mysqli_close` | N/A | Closes a previously opened database connection
`mysqli::commit` | `mysqli_commit` | N/A | Commits the current transaction
`mysqli::__construct` | `mysqli_connect` | N/A | Open a new connection to the MySQL server [Note: static (i.e. class) method]
`mysqli::debug` | `mysqli_debug` | N/A | Performs debugging operations
`mysqli::dump_debug_info` | `mysqli_dump_debug_info` | N/A | Dump debugging information into the log
`mysqli::get_charset` | `mysqli_get_charset` | N/A | Returns a character set object
`mysqli::get_connection_stats` | `mysqli_get_connection_stats` | N/A | Returns client connection statistics. &mysqli.available.mysqlnd;
`mysqli::get_client_info` | `mysqli_get_client_info` | N/A | Returns the MySQL client version as a string
N/A | `mysqli_get_client_stats` | N/A | Returns client per-process statistics. &mysqli.available.mysqlnd;
`mysqli::get_server_info` | `mysqli_get_server_info` | N/A | Returns a string representing the version of the MySQL server that the MySQLi extension is connected to
`mysqli::get_warnings` | `mysqli_get_warnings` | N/A | NOT DOCUMENTED
`mysqli::init` | `mysqli_init` | N/A | Initializes MySQLi and returns an object for use with mysqli_real_connect.
`mysqli::kill` | `mysqli_kill` | N/A | Asks the server to kill a MySQL thread
`mysqli::more_results` | `mysqli_more_results` | N/A | Check if there are any more query results from a multi query
`mysqli::multi_query` | `mysqli_multi_query` | N/A | Performs a query on the database
`mysqli::next_result` | `mysqli_next_result` | N/A | Prepare next result from multi_query
`mysqli::options` | `mysqli_options` | `mysqli_set_opt` | Set options
`mysqli::ping` | `mysqli_ping` | N/A | Pings a server connection, or tries to reconnect if the connection has gone down
`mysqli::prepare` | `mysqli_prepare` | N/A | Prepare an SQL statement for execution
`mysqli::query` | `mysqli_query` | N/A | Performs a query on the database
`mysqli::real_connect` | `mysqli_real_connect` | N/A | Opens a connection to a mysql server
`mysqli::real_escape_string`, `mysqli::escape_string` | `mysqli_real_escape_string` | `mysqli_escape_string` | Escapes special characters in a string for use in an SQL statement, taking into account the current charset of the connection
`mysqli::real_query` | `mysqli_real_query` | N/A | Execute an SQL query
`mysqli::refresh` | `mysqli_refresh` | N/A | Flushes tables or caches, or resets the replication server information
`mysqli::rollback` | `mysqli_rollback` | N/A | Rolls back current transaction
`mysqli::select_db` | `mysqli_select_db` | N/A | Selects the default database for database queries
`mysqli::set_charset` | `mysqli_set_charset` | N/A | Sets the default client character set
`mysqli::ssl_set` | `mysqli_ssl_set` | N/A | Used for establishing secure connections using SSL
`mysqli::stat` | `mysqli_stat` | N/A | Gets the current system status
`mysqli::stmt_init` | `mysqli_stmt_init` | N/A | Initializes a statement and returns an object for use with mysqli_stmt_prepare
`mysqli::store_result` | `mysqli_store_result` | N/A | Transfers a result set from the last query
`mysqli::thread_id` | `mysqli_thread_id` | N/A | Returns the thread ID for the current connection
`mysqli::thread_safe` | `mysqli_thread_safe` | N/A | Returns whether thread safety is given or not
`mysqli::use_result` | `mysqli_use_result` | N/A | Initiate a result set retrieval

## Summary of `mysqli_stmt` methods

MySQL_STMT
OOP Interface | Procedural Interface | Alias (Do not use) | Description
Properties
$mysqli_stmt::affected_rows | `mysqli_stmt_affected_rows` | N/A | Returns the total number of rows changed, deleted, or inserted by the last executed statement
$mysqli_stmt::errno | `mysqli_stmt_errno` | N/A | Returns the error code for the most recent statement call
$mysqli_stmt::error | `mysqli_stmt_error` | N/A | Returns a string description for last statement error
$mysqli_stmt::field_count | `mysqli_stmt_field_count` | N/A | Returns the number of field in the given statement - not documented
$mysqli_stmt::insert_id | `mysqli_stmt_insert_id` | N/A | Get the ID generated from the previous INSERT operation
$mysqli_stmt::num_rows | `mysqli_stmt_num_rows` | N/A | Return the number of rows in statements result set
$mysqli_stmt::param_count | `mysqli_stmt_param_count` | N/A | Returns the number of parameter for the given statement
$mysqli_stmt::sqlstate | `mysqli_stmt_sqlstate` | N/A | Returns SQLSTATE error from previous statement operation
Methods
`mysqli_stmt::attr_get` | `mysqli_stmt_attr_get` | N/A | Used to get the current value of a statement attribute
`mysqli_stmt::attr_set` | `mysqli_stmt_attr_set` | N/A | Used to modify the behavior of a prepared statement
`mysqli_stmt::bind_param` | `mysqli_stmt_bind_param` | N/A | Binds variables to a prepared statement as parameters
`mysqli_stmt::bind_result` | `mysqli_stmt_bind_result` | N/A | Binds variables to a prepared statement for result storage
`mysqli_stmt::close` | `mysqli_stmt_close` | N/A | Closes a prepared statement
`mysqli_stmt::data_seek` | `mysqli_stmt_data_seek` | N/A | Seeks to an arbitrary row in statement result set
`mysqli_stmt::execute` | `mysqli_stmt_execute` | `mysqli_execute` | Executes a prepared Query
`mysqli_stmt::fetch` | `mysqli_stmt_fetch` | N/A | Fetch results from a prepared statement into the bound variables
`mysqli_stmt::free_result` | `mysqli_stmt_free_result` | N/A | Frees stored result memory for the given statement handle
`mysqli_stmt::get_result` | `mysqli_stmt_get_result` | N/A | Gets a result set from a prepared statement. &mysqli.available.mysqlnd;
`mysqli_stmt::get_warnings` | `mysqli_stmt_get_warnings` | N/A | NOT DOCUMENTED
`mysqli_stmt::more_results` | `mysqli_stmt_more_results` | N/A | Checks if there are more query results from a multiple query
`mysqli_stmt::next_result` | `mysqli_stmt_next_result` | N/A | Reads the next result from a multiple query
`mysqli_stmt::num_rows` | `mysqli_stmt_num_rows` | N/A | See also property $mysqli_stmt::num_rows
`mysqli_stmt::prepare` | `mysqli_stmt_prepare` | N/A | Prepare an SQL statement for execution
`mysqli_stmt::reset` | `mysqli_stmt_reset` | N/A | Resets a prepared statement
`mysqli_stmt::result_metadata` | `mysqli_stmt_result_metadata` | N/A | Returns result set metadata from a prepared statement
`mysqli_stmt::send_long_data` | `mysqli_stmt_send_long_data` | N/A | Send data in blocks
`mysqli_stmt::store_result` | `mysqli_stmt_store_result` | N/A | Transfers a result set from a prepared statement

## Summary of `mysqli_result` methods

mysqli_result
OOP Interface | Procedural Interface | Alias (Do not use) | Description
Properties
$mysqli_result::current_field | `mysqli_field_tell` | N/A | Get current field offset of a result pointer
$mysqli_result::field_count | `mysqli_num_fields` | N/A | Get the number of fields in a result
$mysqli_result::lengths | `mysqli_fetch_lengths` | N/A | Returns the lengths of the columns of the current row in the result set
$mysqli_result::num_rows | `mysqli_num_rows` | N/A | Gets the number of rows in a result
Methods
`mysqli_result::data_seek` | `mysqli_data_seek` | N/A | Adjusts the result pointer to an arbitrary row in the result
`mysqli_result::fetch_all` | `mysqli_fetch_all` | N/A | Fetches all result rows and returns the result set as an associative array, a numeric array, or both. &mysqli.available.mysqlnd;
`mysqli_result::fetch_array` | `mysqli_fetch_array` | N/A | Fetch a result row as an associative, a numeric array, or both
`mysqli_result::fetch_assoc` | `mysqli_fetch_assoc` | N/A | Fetch a result row as an associative array
`mysqli_result::fetch_column` | `mysqli_fetch_column` | N/A | Fetch a single column from the next row of a result set
`mysqli_result::fetch_field_direct` | `mysqli_fetch_field_direct` | N/A | Fetch meta-data for a single field
`mysqli_result::fetch_field` | `mysqli_fetch_field` | N/A | Returns the next field in the result set
`mysqli_result::fetch_fields` | `mysqli_fetch_fields` | N/A | Returns an array of objects representing the fields in a result set
`mysqli_result::fetch_object` | `mysqli_fetch_object` | N/A | Returns the current row of a result set as an object
`mysqli_result::fetch_row` | `mysqli_fetch_row` | N/A | Get a result row as an enumerated array
`mysqli_result::field_seek` | `mysqli_field_seek` | N/A | Set result pointer to a specified field offset
`mysqli_result::free`, mysqli_result::close, mysqli_result::free_result | `mysqli_free_result` | N/A | Frees the memory associated with a result

## Summary of `mysqli_driver` methods

MySQL_Driver
OOP Interface | Procedural Interface | Alias (Do not use) | Description
Properties
$mysqli_driver::mysqli_report | `mysqli_report` | N/A | Sets mysqli error reporting mode
Methods
`mysqli_driver::embedded_server_end` | `mysqli_embedded_server_end` | N/A | NOT DOCUMENTED
`mysqli_driver::embedded_server_start` | `mysqli_embedded_server_start` | N/A | NOT DOCUMENTED

Alias functions are provided for backward compatibility purposes only. Do not use them in new projects.