Merge pull request '[nsfw] Rewrite string condition to avoid warning message' (#1393) from MrPetovan/friendica-addons:bug/warnings into develop

Reviewed-on: https://git.friendi.ca/friendica/friendica-addons/pulls/1393

nsfw/nsfw.php

@@ -88,7 +88,7 @@ function nsfw_addon_settings_post(array &$b)
 		$word_list = explode(',', $words);
 		foreach ($word_list as $word) {
 			$word = trim($word);
-			if (!$words || $word[0] != '/') {
+			if (!$words || strpos($word, '/') !== 0) {
 				continue;
 			}