Make DOA query functions public

src/common/article.php

@@ -25,17 +25,17 @@ class Article {
         $this->client = mysqli_connect($host, $user, $pass, $db);
     }
 
-    function getAllPosts() {
+    public function getAllPosts() {
         $result = mysqli_query($this->client, 'SELECT * FROM post');
         return mysqli_fetch_all($result);
     }
 
-    function getMostRecentPosts($limit){
+    public function getMostRecentPosts($limit){
         $result = mysqli_query($this->client, 'SELECT * FROM post ORDER BY created DESC LIMIT ' . $limit);
         return mysqli_fetch_all($result);
     }
 
-    function getPostData($postId) {
+    public function getPostData($postId) {
         $result = mysqli_query($this->client, 'SELECT * FROM post WHERE ID = ' . $postId);
         return mysqli_fetch_all($result);
     }