( ! ) Warning: mysqli_real_connect() [<a href='function.mysqli-real-connect'>function.mysqli-real-connect</a>]: (HY000/2003): Can't connect to MySQL server on '192.168.30.31' (111) in /var/www/wp-includes/wp-db.php on line 1531
Call Stack
#	Time	Memory	Function	Location
1	0.0003	637552	{main}( )	../index.php:0
2	0.0005	642480	require( '/var/www/wp-blog-header.php' )	../index.php:17
3	0.0008	675128	require_once( '/var/www/wp-load.php' )	../wp-blog-header.php:14
4	0.0011	697776	require_once( '/var/www/wp-config.php' )	../wp-load.php:37
5	0.0022	917448	require_once( '/var/www/wp-settings.php' )	../wp-config.php:95
6	0.0172	5195624	require_wp_db( )	../wp-settings.php:111
7	0.0195	6104104	wpdb->__construct( )	../load.php:404
8	0.0195	6104992	wpdb->db_connect( )	../wp-db.php:592
9	0.0196	6109616	mysqli_real_connect ( )	../wp-db.php:1531

( ! ) Warning: mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Can't connect to MySQL server on '192.168.30.31' (111) in /var/www/wp-includes/wp-db.php on line 1562
Call Stack
#	Time	Memory	Function	Location
1	0.0003	637552	{main}( )	../index.php:0
2	0.0005	642480	require( '/var/www/wp-blog-header.php' )	../index.php:17
3	0.0008	675128	require_once( '/var/www/wp-load.php' )	../wp-blog-header.php:14
4	0.0011	697776	require_once( '/var/www/wp-config.php' )	../wp-load.php:37
5	0.0022	917448	require_once( '/var/www/wp-settings.php' )	../wp-config.php:95
6	0.0172	5195624	require_wp_db( )	../wp-settings.php:111
7	0.0195	6104104	wpdb->__construct( )	../load.php:404
8	0.0195	6104992	wpdb->db_connect( )	../wp-db.php:592
9	0.0199	6107640	wpdb->db_connect( )	../wp-db.php:1557
10	0.0199	6107784	mysql_connect ( )	../wp-db.php:1562

WordPress › Error

Error establishing a database connection

This either means that the username and password information in your wp-config.php file is incorrect or we can’t contact the database server at 192.168.30.31:3306. This could mean your host’s database server is down.

Are you sure you have the correct username and password?
Are you sure that you have typed the correct hostname?
Are you sure that the database server is running?

If you’re unsure what these terms mean you should probably contact your host. If you still need help you can always visit the WordPress Support Forums.