posts_clauses Hook in WPFTS

The posts_clauses hook in WordPress is a filter that allows modification of various parts of the SQL query used to retrieve posts, including FIELDS, JOIN, WHERE, GROUP BY, ORDER BY, DISTINCT, and LIMIT. WPFTS uses this hook solely for collecting information about the query and does not make any changes to it.

What WPFTS does when posts_clauses is called:

1. Saving query data: WPFTS saves the passed $clauses array, containing all parts of the SQL query, into the global array $GLOBALS['posts_clauses']. This is done to access the complete SQL query at later stages, for example, for debugging purposes.

2. Returning query data without changes: The plugin returns the $clauses array without any modifications. This means that WPFTS does not affect the query itself at this hook.

Important functions involved in processing posts_clauses:

• WPFTS_Search::index_posts_clauses()

How to use it in addon development:

Addon developers should be aware that WPFTS does not modify the query at this hook, but only saves it for later use. If your addon also uses this hook, you can be sure that WPFTS will not interfere with its operation. However, it is worth considering that WPFTS may modify the query on other hooks, such as posts_search, posts_join, posts_orderby, etc.

Additional notes:

• WPFTS uses the global array $GLOBALS['posts_clauses'] to store query data.

• This hook can be useful for debugging and analyzing SQL queries generated by WordPress.

The posts_clauses hook in WPFTS is designed only for information gathering and does not affect the query itself. This is important to consider when developing addons.