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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 |
|---|---|
| 1389 | |
| 1390 | /** |
| 1391 | * Filters the prefix that indicates that a search term should be excluded from results. |
| 1392 | * |
| 1393 | * @since 4.7.0 |
| 1394 | * |
| 1395 | * @param string $exclusion_prefix The prefix. Default '-'. Returning |
| 1396 | * an empty value disables exclusions. |
| 1397 | */ |
| 1398 | $exclusion_prefix = apply_filters( 'wp_query_search_exclusion_prefix', '-' ); |
| 1399 | |
| 1400 | foreach ( $q['search_terms'] as $term ) { |
| 1401 | // If there is an $exclusion_prefix, terms prefixed with it should be excluded. |
| 1402 | $exclude = $exclusion_prefix && ( substr( $term, 0, 1 ) === $exclusion_prefix ); |
| 1403 | if ( $exclude ) { |
| 1404 | $like_op = 'NOT LIKE'; |
| 1405 | $andor_op = 'AND'; |
| 1406 | $term = substr( $term, 1 ); |
| 1407 | } else { |