Use UTF-8 mode for preg_split and preg_replace

Otherwise a single application with a description containing a non compliant character can break the whole ownCloud appstore. This is for example https://apps.owncloud.com/content/show.php?content=149553

Fixes https://github.com/owncloud/core/issues/17101#issuecomment-117365224

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/private/app.php b/lib/private/app.php
index 1ebad2db770..6c38cdb8223 100644
--- a/lib/private/app.php
+++ b/lib/private/app.php
@@ -1227,17 +1227,18 @@ class OC_App {
 			// manages line breaks itself
 
 			// first of all we split on empty lines
-			$paragraphs = preg_split("!\n[[:space:]]*\n!m", $data['description']);
+			$paragraphs = preg_split("!\n[[:space:]]*\n!mu", $data['description']);
 
 			$result = [];
 			foreach ($paragraphs as $value) {
 				// replace multiple whitespace (tabs, space, newlines) inside a paragraph
 				// with a single space - also trims whitespace
-				$result[] = trim(preg_replace('![[:space:]]+!m', ' ', $value));
+				$result[] = trim(preg_replace('![[:space:]]+!mu', ' ', $value));
 			}
 
 			// join the single paragraphs with a empty line in between
 			$data['description'] = implode("\n\n", $result);
+
 		}
 
 		return $data;