add search filters

functions.php

@@ -172,11 +172,37 @@ add_filter( 'single_template', function ( $single_template ) {
 
 #search
 function my_search_order( $query ) {
+
+    $s = trim($_GET['s']);
+
     if ($query->is_search) {
-        if (!isset($_GET['search_type']) OR $_GET['search_type'] == 'date'){
-            $query->set( 'order', 'DESC' );
-            $query->set( 'orderby', 'date' );
-        }    
+
+        if (empty($query)){
+            $query .=" AND 0=1 ";
+            return $query;
+        }
+
+       if(strpos($s, "#") !== false) {
+            
+            //$terms = explode('#', $s);
+            $terms = substr($s, 1);
+
+            $query->set('tax_query', [
+                'relation' => 'OR',
+                [
+                    'taxonomy' => 'post_tag', 
+                    'field' => 'name',
+                    'terms' => $terms
+                ]
+            ]);
+
+        } 
+        
+       // if (!isset($_GET['search_type']) OR $_GET['search_type'] == 'date'){
+       //     $query->set( 'order', 'DESC' );
+       //     $query->set( 'orderby', 'date' );
+       // }
+
     };
     return $query;
 };