diff --git a/RestControllers/PostsController.php b/RestControllers/PostsController.php
index f3e98cc..3244ea9 100644
--- a/RestControllers/PostsController.php
+++ b/RestControllers/PostsController.php
@@ -56,6 +56,31 @@ class PostsController {
 		return $this->parsePostsList($posts);
 	}
 
+	/**
+	 * Get group posts
+	 * 
+	 * @url POST /posts/get_group
+	 */
+	public function getGroupPosts(){
+
+		//Get group ID
+		$groupID = getPostGroupIdWithAccess("groupID", GroupInfo::VIEW_ACCESS);
+
+		//Get the startpoint for the posts
+		$startFrom = postInt("startFrom", 0);
+
+		//Check whether the user can see members only posts or not
+		$membershipLevel = components()->groups->getMembershipLevel(userID, $groupID);
+		$seeAllPosts = $membershipLevel <= GroupMember::MEMBER;
+
+		//Get the posts of the group
+		$posts = components()->posts->getGroupPosts($groupID, $seeAllPosts, $startFrom);
+
+		//Return parsed list of posts
+		return $this->parsePostsList($posts);
+
+	}
+
 	/**
 	 * Get the latest posts for the user
 	 * 
diff --git a/classes/components/posts.php b/classes/components/posts.php
index 1081917..434ab49 100644
--- a/classes/components/posts.php
+++ b/classes/components/posts.php
@@ -159,6 +159,56 @@ class Posts {
 
 	}
 
+	/**
+	 * Get the posts of a group
+	 * 
+	 * @param int $groupID The ID of the related group
+	 * @param bool $all_posts Specify whether we should get all the posts of the user or not
+	 * @param int $from Start point for the query
+	 * @param int $limit The limit for the request (default = 10)
+	 */
+	public function getGroupPosts(int $groupID, bool $all_posts, int $from = 0, int $limit = 10){
+
+		//Check the value of limit (security)
+		if($limit < 1){
+			throw new Exception("The limit of the query must absolutly be positive !");
+		}
+
+		//Get user visibility level
+		$visibilityLevel = $all_posts ? $this::VISIBILITY_USER : $this::VISIBILITY_PUBLIC;
+
+		//Prepare the request on the database
+		$conditions = "WHERE group_id = ? AND (";
+		$dataConds = array($groupID);
+
+		//Add the visibility level conditions
+		$conditions .= "(niveau_visibilite <= ?)";
+		$dataConds[] = $visibilityLevel;
+
+		//Close permissions conditions
+		$conditions .= ")";
+		
+		//Add startpoint condition if required (and get older messages)
+		if($from != 0){
+			$conditions .= " AND ID <= ? ";
+			$dataConds[] = $from;
+		}
+
+		//Specify order and limit
+		$conditions.= " ORDER BY ID DESC LIMIT ".$limit;
+
+		//Perform the request
+		$list = CS::get()->db->select(
+			$this::TABLE_NAME,
+			$conditions,
+			$dataConds
+		);
+
+		//Parse and return posts
+		return $this->processGetMultiple($list, TRUE);
+
+	}
+
 	/**
 	 * Get the list of latest posts for a user
 	 * 
@@ -406,7 +456,7 @@ class Posts {
 				return $this::NO_ACCESS;
 			
 			//Check if the group is open or not
-			if(!components()->groups->is_open($post_info->get_group_id()))
+			if(!components()->groups->isOpen($post_info->get_group_id()))
 				return $this::NO_ACCESS;
 			
 			// Post public + open group > basic access
diff --git a/functions/requests.php b/functions/requests.php
index 4c8bebf..f662c96 100644
--- a/functions/requests.php
+++ b/functions/requests.php
@@ -102,15 +102,19 @@ function postBool(string $name) : bool {
  * This function makes a REST_Error in case of error
  * 
  * @param string $name The name of the $_POST field
+ * @param string $default The default value (null = none)
  * @return int The integer
  */
-function postInt(string $name) : int {
+function postInt(string $name, string $default = null) : int {
 	
 	//Check the variable
-	if(!isset($_POST[$name]))
+	if(!isset($_POST[$name]) && $default == null)
 		Rest_fatal_error(400, "Please add a POST integer named '".$name."' in the request !");
 
-	return (int)$_POST[$name];
+	if(isset($_POST[$name]))
+		return (int)$_POST[$name];
+	else
+		return (int) $default;
 }
 
 /**