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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 |
---|---|
2220 | if ( ! $q['suppress_filters'] ) { |
2221 | /** |
2222 | * Filters the ORDER BY used when ordering search results. |
2223 | * |
2224 | * @since 3.7.0 |
2225 | * |
2226 | * @param string $search_orderby The ORDER BY clause. |
2227 | * @param WP_Query $this The current WP_Query instance. |
2228 | */ |
2229 | $search_orderby = apply_filters( 'posts_search_orderby', $search_orderby, $this ); |
2230 | } |
2231 |
|
2232 | if ( $search_orderby ) |
2233 | $orderby = $orderby ? $search_orderby . ', ' . $orderby : $search_orderby; |
2234 | } |
2235 |
|
2236 | if ( is_array( $post_type ) && count( $post_type ) > 1 ) { |
2237 | $post_type_cap = 'multiple_post_type'; |
2238 | } else { |