Online PHP editor | output for 2a1u3

<?php class Post { const TABLE = 'posts'; const TYPE = 'post'; static public function all() { $select = "SELECT * FROM `%s` WHERE `type` = '%s'\n"; echo sprintf($select, self::TABLE, self::TYPE); } } Post::all(); class Comment extends Post { const TYPE = 'comment'; } Comment::all(); echo "===\n'; class PostA { const TABLE = 'posts'; const TYPE = 'post'; static public function all() { $select = "SELECT * FROM `%s` WHERE `type` = '%s'\n"; echo sprintf($select, static::TABLE, static::TYPE); } } PostA::all(); // SELECT * FROM `posts` WHERE `type` = 'post' class CommentA extends PostA { const TYPE = 'comment'; } CommentA::all();