Relevanssi does search in custom field, but it does not work with phrases (searching for a phrase like "The whole phrase"). Actually the following little patch solves this problem:
Insert
//added by continent7 to make phrase-search in custom field available
$query = "SELECT ID
FROM $wpdb->posts AS p, $wpdb->postmeta AS m
WHERE p.ID = m.post_id
AND m.meta_value LIKE '%$phrase%'
AND p.post_status = 'publish'";
$docs = $wpdb->get_results($query);
if (is_array($docs)) {
foreach ($docs as $doc) {
if (!isset($phrase_matches[$phrase])) {
$phrase_matches[$phrase] = array();
}
$phrase_matches[$phrase][] = $doc->ID;
}
}in relevanssi_recognize_phrases() (relevanssi.php) right under
$query = "SELECT ID FROM $wpdb->posts as p, $wpdb->term_relationships as r, $wpdb->term_taxonomy as s, $wpdb->terms as t
WHERE r.term_taxonomy_id = s.term_taxonomy_id AND s.term_id = t.term_id AND p.ID = r.object_id
AND t.name LIKE '%$phrase%' AND p.post_status = 'publish'";
$docs = $wpdb->get_results($query);
if (is_array($docs)) {
foreach ($docs as $doc) {
if (!isset($phrase_matches[$phrase])) {
$phrase_matches[$phrase] = array();
}
$phrase_matches[$phrase][] = $doc->ID;
}
}
