wp_query_search_exclusion_prefix │ filter-hook │ WC 1.0

This filter is documented in wp-includes/class-wp-query.php

Usage

add_filter( 'wp_query_search_exclusion_prefix', 'wp_kama_query_search_exclusion_prefix_filter' );

/**
 * Function for `wp_query_search_exclusion_prefix` filter-hook.
 * 
 * @param string $exclusion_prefix The prefix. Returning an empty value disables exclusions.
 *
 * @return string
 */
function wp_kama_query_search_exclusion_prefix_filter( $exclusion_prefix ){

	// filter...
	return $exclusion_prefix;
}

$exclusion_prefix(string)

The prefix. Returning an empty value disables exclusions.
Default: '-'

Where the hook is called

$exclusion_prefix = (string) apply_filters( 'wp_query_search_exclusion_prefix', '-' ); // phpcs:ignore WooCommerce.Commenting.CommentHooks.MissingSinceComment

Where the hook is used in WooCommerce