2 files changed, 26 insertions, 5 deletions
diff --git a/phpBB/phpbb/textformatter/s9e/utils.php b/phpBB/phpbb/textformatter/s9e/utils.php
index b317fe4a8d..a9a6d4b892 100644
--- a/phpBB/phpbb/textformatter/s9e/utils.php
+++ b/phpBB/phpbb/textformatter/s9e/utils.php
@@ -136,4 +136,17 @@ class utils implements \phpbb\textformatter\utils_interface
 	{
 		return \s9e\TextFormatter\Unparser::unparse($xml);
 	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_empty($text)
+	{
+		if ($text === null || $text === '')
+		{
+			return true;
+		}
+
+		return trim($this->unparse($text)) === '';
+	}
 }
diff --git a/phpBB/phpbb/textformatter/utils_interface.php b/phpBB/phpbb/textformatter/utils_interface.php
index 4810453cd1..4b7392976a 100644
--- a/phpBB/phpbb/textformatter/utils_interface.php
+++ b/phpBB/phpbb/textformatter/utils_interface.php
@@ -62,10 +62,18 @@ interface utils_interface
 	public function remove_bbcode($text, $bbcode_name, $depth = 0);
 
 	/**
-	* Return a parsed text to its original form
-	*
-	* @param  string $text Parsed text
-	* @return string       Original plain text
-	*/
+	 * Return a parsed text to its original form
+	 *
+	 * @param  string $text Parsed text
+	 * @return string       Original plain text
+	 */
 	public function unparse($text);
+
+	/**
+	 * Return whether or not a parsed text represent an empty text.
+	 *
+	 * @param  string $text Parsed text
+	 * @return bool         Tue if the original text is empty
+	 */
+	public function is_empty($text);
 }