Functions file mods and CPU
Nope or Not really or Not noticeably.
database
Switched server & domain name, now custom post types won’t save
Try re-generating the permalinks structure. And check that you have the correct urls in the general options (WPURL and URL)
Saving data to database and exporting to excel
You have some options: the cformsII plugin, with tracking enabled the Contact Form 7, plus the Contact Form 7 to Database Extension other may be suitable as well!
Allow users to enter and edit data in one-to-many configuration
You can just alter the default user profile fields and add/remove whatever you want or use a plugin that does so. Alternatively you can use plugin like gravity forms or wufoo.
export individual posts to text files or a single csv file
The WordPress plugin repository has several “export to CSV” plugins available. For example this one looks interesting. Its also a good startpoint if you don’t want to use a plugin and code this on your own.
Creating fields in the database
Read the WordPress codex, specifically http://codex.wordpress.org/Plugin_API and if you are looking to create tables read http://codex.wordpress.org/Creating_Tables_with_Plugins. Make sure you remove them if the plugin is uninstalled.
Create New Admin Menu Section – Like how custom post type works, in a way
Check out the Administration Menus section in the Codex, I actually used it pretty heavily over the last couple days to create a sub-menu and it helped a lot. It goes into detail on the top level menus as well. You’ll specifically need the add_menu_page() function to create the top level menu, as well as … Read more
Multi database link and mix and match email alert
I will use gravity form… it make interaction with data easy… i have found type and view : http://wp-types.com/features/ that look nice too
Load posts from external source if not found in database
Possibly the place to do this would be in the 404.php file of your theme. If there isn’t one, create one and WordPress will pick up. Note: if you want to return “non-404” content from this file you will probably need to clear the headers and set the status to 200. I’ve done something very … Read more
Managing database tables in WordPress multisite
use the API, the functions of WordPress for save data and check before, it is an Multisite install; thats all. The first example is only for check, is the activated as network wide. // if is active in network of multisite if ( is_multisite() && isset($_GET[‘networkwide’]) && 1 == $_GET[‘networkwide’] ) { add_site_option( ‘my_settings_id’, $data … Read more