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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 |
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1323 |
|
1324 | /** |
1325 | * Filters the prefix that indicates that a search term should be excluded from results. |
1326 | * |
1327 | * @since 4.7.0 |
1328 | * |
1329 | * @param string $exclusion_prefix The prefix. Default '-'. Returning |
1330 | * an empty value disables exclusions. |
1331 | */ |
1332 | $exclusion_prefix = apply_filters( 'wp_query_search_exclusion_prefix', '-' ); |
1333 |
|
1334 | foreach ( $q['search_terms'] as $term ) { |
1335 | // If there is an $exclusion_prefix, terms prefixed with it should be excluded. |
1336 | $exclude = $exclusion_prefix && ( $exclusion_prefix === substr( $term, 0, 1 ) ); |
1337 | if ( $exclude ) { |
1338 | $like_op = 'NOT LIKE'; |
1339 | $andor_op = 'AND'; |
1340 | $term = substr( $term, 1 ); |
1341 | } else { |