Fires after WordPress has finished loading but before any headers are sent.

Fires before a particular screen is loaded.

Filters the locale ID of the WordPress installation.

Filters the HTML output for the Log In/Log Out link.

Filters the columns displayed in the Posts list table.

Fires in each custom column in the Posts list table.

Filters the list of rewrite rules formatted for output to an .htaccess file.

Filters the month archive permalink.

Filters the value of an existing option.

Used to call the registered callback for a plugin screen.