wp-includes/class-wp-rewrite.php:1992Sets the category base for the category permalink.
$category_basestring public function set_category_base( $category_base ) { if ( get_option( 'category_base' ) !== $category_base ) { update_option( 'category_base', $category_base ); $this->init(); } }Introduced in 1.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-rewrite.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.