Function: Retrieve all options as it was for 1.2.

Function: Execute changes made in WordPress 3.4.

Function: Version of get_option that is private to install/upgrade.

Function: Execute changes made in WordPress 3.5.

Function: Filters for content to remove unnecessary slashes.

Function: Execute changes made in WordPress 3.7.

Function: Modifies the database based on specified SQL statements.

Function: Execute changes made in WordPress 3.7.2.

Function: Execute changes made in WordPress 3.8.0.

Function: Executes network-level upgrade routines.

Function: Creates a table in the database if it doesn’t already exist.

Function: Drops a specified index from a table.

Function: Execute changes made in WordPress 2.9.

Function: Execute changes made in WordPress 2.1.

Function: Execute changes made in WordPress 2.3.

Function: Remove old options from the database.

Function: Runs WordPress Upgrade functions.

Function: Remove old categories, link2cat, and post2cat database tables.

Function: Upgrade old slugs made in version 2.2.

Function: Functions to be called in install and upgrade scripts.

Function: Execute changes made in WordPress 2.5.0.

Function: Execute changes made in WordPress 1.0.

Function: Execute changes made in WordPress 2.5.2.

Function: Execute changes made in WordPress 1.0.1.

Function: Execute changes made in WordPress 2.6.

Function: Execute changes made in WordPress 1.2.

Function: Execute changes made in WordPress 2.7.

Function: Execute changes made in WordPress 1.5.