feat: search function enhancement (#338)

inc/theme-core.php

@@ -250,4 +250,36 @@ function custom_upload_filter($file)
     }
 
     return $file;
+}
+
+// 仅搜索文章标题
+if (kratos_option('g_search', false)) {
+    add_filter('posts_search', 'search_enhancement', 10, 2);
+
+    function search_enhancement($search, $wp_query)
+    {
+        if (!empty($search) && !empty($wp_query->query_vars['search_terms']))
+        {
+            global $wpdb;
+        
+            $q = $wp_query->query_vars;    
+            $n = !empty($q['exact']) ? '' : '%';
+        
+            $search = array();
+
+            foreach ((array)$q['search_terms'] as $term)
+            {
+                $search[] = $wpdb->prepare("$wpdb->posts.post_title LIKE %s", $n . $wpdb->esc_like( $term ) . $n);
+            }
+
+            if (!is_user_logged_in())
+            {
+                $search[] = "$wpdb->posts.post_password = ''";
+            }
+
+            $search = ' AND ' . implode(' AND ', $search);
+        }
+
+        return $search;
+    }
 }

inc/theme-options.php

@@ -112,9 +112,9 @@ function kratos_options()
     );
 
     $options[] = array(	
-        'name' => __('多人模式', 'kratos'),	
-        'desc' => __('在文章列表显示当前文章作者，在文章页面页脚显示当前作者介绍', 'kratos'),	
-        'id' => 'multiusers',	
+        'name' => __('搜索增强', 'kratos'),	
+        'desc' => __('仅查找文章标题，而不全文搜索（适用于文章数量较多的站点）', 'kratos'),	
+        'id' => 'g_search',	
         'type' => 'checkbox',	
     );
 

pages/page-content.php

@@ -45,9 +45,7 @@
         <span class="float-left d-block">
             <span class="mr-2"><i class="kicon i-hot"></i><?php echo get_post_views(); _e('点热度', 'kratos'); ?></span>
             <span class="mr-2"><i class="kicon i-good"></i><?php if (get_post_meta($post->ID, 'love', true)) {echo get_post_meta($post->ID, 'love', true);} else {echo '0';} _e('人点赞', 'kratos'); ?></span>
-            <?php if(kratos_option('multiusers',false)){ ?>
-                <span class="mr-2"><i class="kicon i-author"></i><?php echo get_the_author_meta('display_name'); ?></span>
-            <?php } ?>
+            <span class="mr-2"><i class="kicon i-author"></i><?php echo get_the_author_meta('display_name'); ?></span>
         </span>
         <span class="float-right">
             <a href="<?php the_permalink(); ?>"><?php _e('阅读全文', 'kratos'); ?><i class="kicon i-rightbutton"></i></a>