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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
2398 | if ( ! $q['suppress_filters'] ) { |
2399 | /** |
2400 | * Filters the ORDER BY used when ordering search results. |
2401 | * |
2402 | * @since 3.7.0 |
2403 | * |
2404 | * @param string $search_orderby The ORDER BY clause. |
2405 | * @param WP_Query $query The current WP_Query instance. |
2406 | */ |
2407 | $search_orderby = apply_filters( 'posts_search_orderby', $search_orderby, $this ); |
2408 | } |
2409 |
|
2410 | if ( $search_orderby ) { |
2411 | $orderby = $orderby ? $search_orderby . ', ' . $orderby : $search_orderby; |
2412 | } |
2413 | } |
2414 |
|
2415 | if ( is_array( $post_type ) && count( $post_type ) > 1 ) { |
2416 | $post_type_cap = 'multiple_post_type'; |