2 files changed, 40 insertions, 2 deletions
diff --git a/phpBB/includes/functions_content.php b/phpBB/includes/functions_content.php
index c54cc25f34..05d3c5fde2 100644
--- a/phpBB/includes/functions_content.php
+++ b/phpBB/includes/functions_content.php
@@ -413,7 +413,7 @@ function generate_text_for_display($text, $uid, $bitfield, $flags, $censor_text
 	static $bbcode;
 	global $phpbb_dispatcher;
 
-	if (!$text)
+	if ($text === '')
 	{
 		return '';
 	}
@@ -505,7 +505,7 @@ function generate_text_for_storage(&$text, &$uid, &$bitfield, &$flags, $allow_bb
 	$uid = $bitfield = '';
 	$flags = (($allow_bbcode) ? OPTION_FLAG_BBCODE : 0) + (($allow_smilies) ? OPTION_FLAG_SMILIES : 0) + (($allow_urls) ? OPTION_FLAG_LINKS : 0);
 
-	if (!$text)
+	if ($text === '')
 	{
 		return;
 	}
diff --git a/tests/text_processing/generate_text_for_display_test.php b/tests/text_processing/generate_text_for_display_test.php
new file mode 100644
index 0000000000..a157fe7d9a
--- /dev/null
+++ b/tests/text_processing/generate_text_for_display_test.php
@@ -0,0 +1,38 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions.php';
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions_content.php';
+require_once dirname(__FILE__) . '/../mock/user.php';
+require_once dirname(__FILE__) . '/../mock/cache.php';
+
+class phpbb_text_processing_generate_text_for_display_test extends phpbb_test_case
+{
+	public function setUp()
+	{
+		global $cache, $user;
+
+		parent::setUp();
+
+		$cache = new phpbb_mock_cache;
+
+		$user = new phpbb_mock_user;
+		$user->optionset('viewcensors', false);
+	}
+
+	public function test_empty_string()
+	{
+		$this->assertSame('', generate_text_for_display('', '', '', 0));
+	}
+
+	public function test_zero_string()
+	{
+		$this->assertSame('0', generate_text_for_display('0', '', '', 0));
+	}
+}