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<title>[2938] sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-developer/functions.php: developer.wordpress.org: Improve ordering of search results by title relevance.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="http://meta.trac.wordpress.org/changeset/2938">2938</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"http://meta.trac.wordpress.org/changeset/2938","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>coffee2code</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2016-04-12 21:38:46 +0000 (Tue, 12 Apr 2016)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>developer.wordpress.org: Improve ordering of search results by title relevance.
* Show shortest full matches first.
* Convert spaces to underscores when doing title searches for short phrases.
Props keesiemeijer.
Fixes <a href="http://meta.trac.wordpress.org/ticket/1516">#1516</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#sitestrunkwordpressorgpublic_htmlwpcontentthemespubwporgdeveloperfunctionsphp">sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-developer/functions.php</a></li>
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<h3>Diff</h3>
<a id="sitestrunkwordpressorgpublic_htmlwpcontentthemespubwporgdeveloperfunctionsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-developer/functions.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-developer/functions.php 2016-04-12 20:53:31 UTC (rev 2937)
+++ sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-developer/functions.php 2016-04-12 21:38:46 UTC (rev 2938)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -97,6 +97,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'post_type_link', __NAMESPACE__ . '\\method_permalink', 10, 2 );
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'term_link', __NAMESPACE__ . '\\taxonomy_permalink', 10, 3 );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ add_filter( 'posts_orderby', __NAMESPACE__ . '\\search_posts_orderby', 10, 2 );
</ins><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'the_posts', __NAMESPACE__ . '\\rerun_empty_exact_search', 10, 2 );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> add_theme_support( 'automatic-feed-links' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -202,10 +203,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> if ( $query->is_search() ) {
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- // Order searches by title first.
- $query->set( 'orderby', '' );
- $query->set( 'search_orderby_title', 1 );
-
</del><span class="cx" style="display: block; padding: 0 10px"> // If user has '()' at end of a search string, assume they want a specific function/method.
</span><span class="cx" style="display: block; padding: 0 10px"> $s = htmlentities( $query->get( 's' ) );
</span><span class="cx" style="display: block; padding: 0 10px"> if ( '()' === substr( $s, -2 ) ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -220,6 +217,99 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * Filter the SQL for the ORDER BY clause for search queries.
+ *
+ * Adds ORDER BY condition with spaces replaced with underscores in 'post_title'.
+ * Adds ORDER BY condition to order by title length.
+ *
+ * @param string $orderby The ORDER BY clause of the query.
+ * @param WP_Query $query The WP_Query instance (passed by reference).
+ * @return string Filtered order by clause
+ */
+function search_posts_orderby( $orderby, $query ) {
+ global $wpdb;
+
+ if ( $query->is_main_query() && is_search() && ! $query->get( 'exact' ) ) {
+
+ $search_order_by_title = $query->get( 'search_orderby_title' );
+
+ // Check if search_orderby_title is set by WP_Query::parse_search.
+ if ( is_array( $search_order_by_title ) && $search_order_by_title ) {
+
+ // Get search orderby query.
+ $orderby = parse_search_order( $query->query_vars );
+
+ // Add order by title length.
+ $orderby .= " , CHAR_LENGTH( $wpdb->posts.post_title ) ASC, $wpdb->posts.post_title ASC";
+ }
+ }
+
+ return $orderby;
+}
+
+/**
+ * Generate SQL for the ORDER BY condition based on passed search terms.
+ *
+ * Similar to WP_Query::parse_search_order.
+ * Adds ORDER BY condition with spaces replaced with underscores in 'post_title'.
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param array $q Query variables.
+ * @return string ORDER BY clause.
+ */
+function parse_search_order( $q ) {
+ global $wpdb;
+
+ if ( $q['search_terms_count'] > 1 ) {
+ $num_terms = count( $q['search_orderby_title'] );
+
+ // If the search terms contain negative queries, don't bother ordering by sentence matches.
+ $like = $_like = '';
+ if ( ! preg_match( '/(?:\s|^)\-/', $q['s'] ) ) {
+ $like = '%' . $wpdb->esc_like( $q['s'] ) . '%';
+ }
+
+ $search_orderby = '';
+
+ // Sentence match in 'post_title'.
+ if ( $like ) {
+ $search_orderby .= $wpdb->prepare( "WHEN $wpdb->posts.post_title LIKE %s THEN 1 ", $like );
+ $_like = str_replace( '-', '_', sanitize_title_with_dashes( $q['s'] ) );
+ $_like = '%' . $wpdb->esc_like( $_like ) . '%';
+ if ( $_like !== $like ) {
+ // Sentence match in 'post_title' with spaces replaced with underscores.
+ $search_orderby .= $wpdb->prepare( "WHEN $wpdb->posts.post_title LIKE %s THEN 2 ", $_like );
+ }
+ }
+
+ // Sanity limit, sort as sentence when more than 6 terms.
+ // (few searches are longer than 6 terms and most titles are not)
+ if ( $num_terms < 7 ) {
+ // all words in title
+ $search_orderby .= 'WHEN ' . implode( ' AND ', $q['search_orderby_title'] ) . ' THEN 3 ';
+ // any word in title, not needed when $num_terms == 1
+ if ( $num_terms > 1 )
+ $search_orderby .= 'WHEN ' . implode( ' OR ', $q['search_orderby_title'] ) . ' THEN 4 ';
+ }
+
+ // Sentence match in 'post_content'.
+ if ( $like ) {
+ $search_orderby .= $wpdb->prepare( "WHEN $wpdb->posts.post_content LIKE %s THEN 5 ", $like );
+ }
+
+ if ( $search_orderby ) {
+ $search_orderby = '(CASE ' . $search_orderby . 'ELSE 6 END)';
+ }
+ } else {
+ // Single word or sentence search.
+ $search_orderby = reset( $q['search_orderby_title'] ) . ' DESC';
+ }
+
+ return $search_orderby;
+}
+
+/**
</ins><span class="cx" style="display: block; padding: 0 10px"> * Rerun an exact search with the same criteria except exactness if no posts
</span><span class="cx" style="display: block; padding: 0 10px"> * were found.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span></span></pre>
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