diff --git a/phpBB/includes/acp/acp_search.php b/phpBB/includes/acp/acp_search.php
index 53fc6f5925..2c7e36d6e3 100644
--- a/phpBB/includes/acp/acp_search.php
+++ b/phpBB/includes/acp/acp_search.php
@@ -155,7 +155,8 @@ class acp_search
 				$search = $search_backend_factory->get($cfg_array['search_type']);
 				if (confirm_box(true))
 				{
-					if (!method_exists($search, 'init') || !($error = $search->init()))
+					// Initialize search backend, if $error is false means that everything is ok
+					if (!($error = $search->init()))
 					{
 						$config->set('search_type', $cfg_array['search_type']);
 
diff --git a/phpBB/phpbb/search/backend/fulltext_mysql.php b/phpBB/phpbb/search/backend/fulltext_mysql.php
index e95596022b..ef06911c65 100644
--- a/phpBB/phpbb/search/backend/fulltext_mysql.php
+++ b/phpBB/phpbb/search/backend/fulltext_mysql.php
@@ -121,38 +121,18 @@ class fulltext_mysql extends base implements search_backend_interface
 	 */
 	public function is_available(): bool
 	{
-		return $this->db->get_sql_layer() == 'mysqli';
+		// Check if we are using mysql
+		if($this->db->get_sql_layer() != 'mysqli')
+		{
+			return false;
+		}
+
+		return true;
 	}
 
 	/**
 	 * {@inheritdoc}
 	 */
-	public function get_search_query(): string
-	{
-		return $this->search_query;
-	}
-
-	/**
-	 * {@inheritdoc}
-	 */
-	public function get_common_words(): array
-	{
-		return $this->common_words;
-	}
-
-	/**
-	 * {@inheritdoc}
-	 */
-	public function get_word_length(): array
-	{
-		return $this->word_length;
-	}
-
-	/**
-	* Checks for correct MySQL version and stores min/max word length in the config
-	*
-	* @return string|bool Language key of the error/incompatibility occurred
-	*/
 	public function init()
 	{
 		if (!$this->is_available())
@@ -164,15 +144,7 @@ class fulltext_mysql extends base implements search_backend_interface
 		$info = $this->db->sql_fetchrow($result);
 		$this->db->sql_freeresult($result);
 
-		$engine = '';
-		if (isset($info['Engine']))
-		{
-			$engine = $info['Engine'];
-		}
-		else if (isset($info['Type']))
-		{
-			$engine = $info['Type'];
-		}
+		$engine = $info['Engine'] ?? $info['Type'] ?? '';
 
 		$fulltext_supported = $engine === 'Aria' || $engine === 'MyISAM'
 			/**
@@ -182,7 +154,7 @@ class fulltext_mysql extends base implements search_backend_interface
 			 * fixed for proper overall operation. Hence we require 5.6.8.
 			 */
 			|| ($engine === 'InnoDB'
-			&& phpbb_version_compare($this->db->sql_server_info(true), '5.6.8', '>='));
+				&& phpbb_version_compare($this->db->sql_server_info(true), '5.6.8', '>='));
 
 		if (!$fulltext_supported)
 		{
@@ -214,6 +186,30 @@ class fulltext_mysql extends base implements search_backend_interface
 		return false;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_search_query(): string
+	{
+		return $this->search_query;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_common_words(): array
+	{
+		return $this->common_words;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_word_length(): array
+	{
+		return $this->word_length;
+	}
+
 	/**
 	 * {@inheritdoc}
 	 */
diff --git a/phpBB/phpbb/search/backend/fulltext_native.php b/phpBB/phpbb/search/backend/fulltext_native.php
index 81541930a7..ad042a545a 100644
--- a/phpBB/phpbb/search/backend/fulltext_native.php
+++ b/phpBB/phpbb/search/backend/fulltext_native.php
@@ -157,6 +157,14 @@ class fulltext_native extends base implements search_backend_interface
 		return true;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
+	public function init()
+	{
+		return false;
+	}
+
 	/**
 	 * {@inheritdoc}
 	 */
diff --git a/phpBB/phpbb/search/backend/fulltext_postgres.php b/phpBB/phpbb/search/backend/fulltext_postgres.php
index 234b820f29..ad0ad220fc 100644
--- a/phpBB/phpbb/search/backend/fulltext_postgres.php
+++ b/phpBB/phpbb/search/backend/fulltext_postgres.php
@@ -137,6 +137,19 @@ class fulltext_postgres extends base implements search_backend_interface
 		return $this->db->get_sql_layer() == 'postgres';
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
+	public function init()
+	{
+		if (!$this->is_available())
+		{
+			return $this->user->lang['FULLTEXT_POSTGRES_INCOMPATIBLE_DATABASE'];
+		}
+
+		return false;
+	}
+
 	/**
 	 * {@inheritdoc}
 	 */
@@ -171,21 +184,6 @@ class fulltext_postgres extends base implements search_backend_interface
 		return $this->phrase_search;
 	}
 
-	/**
-	* Checks for correct PostgreSQL version and stores min/max word length in the config
-	*
-	* @return string|bool Language key of the error/incompatibility occurred
-	*/
-	public function init()
-	{
-		if (!$this->is_available())
-		{
-			return $this->user->lang['FULLTEXT_POSTGRES_INCOMPATIBLE_DATABASE'];
-		}
-
-		return false;
-	}
-
 	/**
 	 * {@inheritdoc}
 	 */
diff --git a/phpBB/phpbb/search/backend/fulltext_sphinx.php b/phpBB/phpbb/search/backend/fulltext_sphinx.php
index c53116af71..4a65aa944a 100644
--- a/phpBB/phpbb/search/backend/fulltext_sphinx.php
+++ b/phpBB/phpbb/search/backend/fulltext_sphinx.php
@@ -214,9 +214,7 @@ class fulltext_sphinx implements search_backend_interface
 	}
 
 	/**
-	* Checks permissions and paths, if everything is correct it generates the config file
-	*
-	* @return string|bool Language key of the error/incompatibility encountered, or false if successful
+	 * {@inheritdoc}
 	*/
 	public function init()
 	{
diff --git a/phpBB/phpbb/search/backend/search_backend_interface.php b/phpBB/phpbb/search/backend/search_backend_interface.php
index 26c87909b9..a22c4bda46 100644
--- a/phpBB/phpbb/search/backend/search_backend_interface.php
+++ b/phpBB/phpbb/search/backend/search_backend_interface.php
@@ -29,6 +29,15 @@ interface search_backend_interface
 	 */
 	public function is_available();
 
+	/**
+	 * Method executed when a search backend is set from acp.
+	 *
+	 * Checks permissions and paths, if everything is correct it generates the config file
+	 *
+	 * @return string|false False if everything was ok or string with error message
+	 */
+	public function init();
+
 	/**
 	 * Returns the search_query
 	 *