I. Attribute analysis
1.tablepre: Table name prefix
2.version: Database version
3.drivertype: Drive Type
4.querynum: Number of Queries
5.curlink: Current Connection
6.link: Storage Connection Resources
7.config: Configuration Items
8.sqldebug:sql Commissioning
9.slaveid: I don't know.
10.map: I don't know.
Two. Method analysis1.db_mysql: Configuring the driver
2.set_config: Configuring the driver
3.connect: Connect to Database
4._dbconnect: The underlying code of the previous method
5.table_name: I don't know.
6.select_db: Selecting a Database
7.fetch_array: Getting the result set as an array
8.result_first: Getting the first piece of data from the result set
9.query: Execute SQL statement
10.affected_rows: Gets the number of record rows affected by the most recent insert,update or DELETE query associated with Link_identifier.
11.error: Return database error message
12.errno: return error number
13.result: Get the row data specified in the result set
14.num_rows: Returns the number of rows in the result set.
15.num_fields: Returns the number of fields (columns) in the result set
16.free_result: The function frees the resulting memory. Returns true if successful, or False if it fails.
17.insert_id: Last inserted data ID
18.fetch_row: Getting the result set as an indexed array
the 19.fetch_fields:mysql_fetch_field () function obtains column information from the result set and returns it as an object.
20.version: Returns the current database version
21.escape_string:mysql_escape_string This method is used to escape characters and is deprecated in PHP5.322.close: Close Connection
23.halt: Throw exception
24.fetch_first: Get the first piece of data
Code Analysis Learning for Discuz (iii) MySQL driver
