[POSTING] Make it possible for plugins to change the placeholder string

components/Posting/Posting.php

@@ -70,6 +70,7 @@ END;
         }
 
         $placeholder_string = ['How are you feeling?', 'Have something to share?', 'How was your day?'];
+        Event::handle('PostingPlaceHolderString', [&$placeholder_string]);
         $rand_key = array_rand($placeholder_string);
 
         $request = $vars['request'];