Restore compatibility with PHP 5.3.3

https://github.com/FreshRSS/FreshRSS/issues/1208

CHANGELOG.md

@@ -5,6 +5,7 @@
 * Compatibility
 	* Require at least MySQL 5.5.3+ [#1153](https://github.com/FreshRSS/FreshRSS/issues/1153)
 	* Require at least PHP 5.3.3+ [#1183](https://github.com/FreshRSS/FreshRSS/pull/1183)
+		* Restore compatibility with PHP 5.3.3 [#1208](https://github.com/FreshRSS/FreshRSS/issues/1208)
 	* Restore compatibility with Microsoft Internet Explorer 11 / Edge [#772](https://github.com/FreshRSS/FreshRSS/issues/772)
 * Features
 	* Support for full Unicode such as emoji 💕 in MySQL with utf8mb4 [#1153](https://github.com/FreshRSS/FreshRSS/issues/1153)