add_rewrite_rule()

add_rewrite_rule() — Adds a rewrite rule that transforms a URL structure to a set of query vars. Any value in the $after parameter that isn’t ‘bottom’ will result in the rule being placed at the top of the rewrite rules.

Inputs: $regex (string): Regular expression to match request against. $query (string|array): The corresponding query vars for this rewrite rule. $after (string): Optional. Priority of the new rule. Accepts ‘top’ or ‘bottom’. Default ‘bottom’.