WordPress多站点使用同一个数据库

/**
 * WordPress Database Table prefix.
 *
 * You can have multiple installations in one database if you give each a unique
 * prefix. Only numbers, letters, and underscores please!
 */
$table_prefix  = 'wp_';

/**
 * WordPress Database Table prefix.
 *
 * You can have multiple installations in one database if you give each a unique
 * prefix. Only numbers, letters, and underscores please!
 */
$table_prefix  = 'blog_';

UPDATE blog_usermeta SET meta_key ='blog_capabilities' WHERE meta_key ='wp_capabilities';
UPDATE blog_usermeta SET meta_key ='blog_user_level' WHERE meta_key ='wp_user_level';
UPDATE blog_options SET option_name='blog_user_roles' WHERE option_name='wp_user_roles';