DBO Application：Debug Log

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### DBO Application：Debug Log
   The DBO debug log is a key tool for troubleshooting errors that cannot be found on the surface.
  
##### DBO Debug Log Path Setting
```php
<?php
$config['db']['dbhost']     = '127.0.0.1';    //server address
$config['db']['dbuser']     = 'root';        //account number
$config['db']['dbpass']     = 'root';        //password
$config['db']['dbname']     = 'databases';    //data storage name
$config['db']['dbtype']     = 'mysqli';        //database type
$config['db']['charset']     = 'utf8';        //character encoding
$config['db']['pre']         = 'n_';            //database header ID
//add the following settings in the database configuration
$config['db']['sqllog'] 		= 'data/tmp_'.$PATH_RAND.'/log/';//sql statement log storage path
//Introduce the dbo class and instantiate it
$db    = load('class/database/dbo','FoundPHP_dbo',$config['db']);
	
?>
```
The debug log storage file name is：201211_sql.txt
```txt
MYSQLi database connection is successful (SERVER:127.0.0.1 USER:foundphp_com DB:foundphp_com)
db:MYSQLi	date:2020-12-11 00:00:23	url:http://www.foundphp.com/
SELECT * FROM `n_user`
db:MYSQLi	date:2020-12-11 00:00:23	url:http://www.foundphp.com/
request statement
db:MYSQLi	date:request time	url:request source
MYSQLi database shutdown。
db:MYSQLi	date:2020-12-11 00:45:20	url:http://www.foundphp.com/
```