<?php

function getUser($id)
{
    return null;
}

function getUserHash($id)
{
    global $conn;
    $stmt = $conn->prepare("SELECT * FROM get_user_hash(?)");
    $stmt->execute(array($id));
    $result = $stmt->fetch();
    return $result['get_user_hash'];
}

function getUserSidebarInfo($id) {
    global $conn;
    $stmt = $conn->prepare("SELECT Member.name FROM Member WHERE Member.id = ?");
    $stmt->execute(array($id));
    $username = $stmt->fetchAll()[0];

    $stmt = $conn->prepare("SELECT * FROM get_complete_friends_of_member(?)");
    $stmt->execute(array($id));
    $friends = $stmt->fetchAll();

    $stmt = $conn->prepare("SELECT * FROM get_complete_groups_of_member(?)");
    $stmt->execute((array($id)));
    $groups = $stmt->fetchAll();

    $userHash = getUserHash($id);

    $result['userId'] = $id;
    $result['username'] = $username;
    $result['userHash'] = $userHash;
    $result['friends'] = $friends;
    $result['groups'] = $groups;

    return $result;
}

function getUserNavbarInfo($id) {
    global $conn;
    $stmt = $conn->prepare("SELECT Member.name FROM Member WHERE Member.id = ?");
    $stmt->execute(array($id));
    $username = $stmt->fetchAll()[0];

    $userHash = getUserHash($id);

    $result['userId'] = $id;
    $result['username'] = $username;
    $result['userHash'] = $userHash;

    return $result;
}
<?php

function getUser($id)
{
    return null;
}

function getUserHash($id)
{
    global $conn;
    $stmt = $conn->prepare("SELECT * FROM get_user_hash(?)");
    $stmt->execute(array($id));
    $result = $stmt->fetch();
    return $result['get_user_hash'];
}

function getUserInfo($id) {
    global $conn;
    $stmt = $conn->prepare("SELECT Member.name FROM Member WHERE Member.id = ?");
    $stmt->execute(array($id));
    $username = $stmt->fetchAll()[0];

    $stmt = $conn->prepare("SELECT * FROM get_complete_friends_of_member(?)");
    $stmt->execute(array($id));
    $friends = $stmt->fetchAll();

    $stmt = $conn->prepare("SELECT * FROM get_complete_groups_of_member(?)");
    $stmt->execute((array($id)));
    $groups = $stmt->fetchAll();

    $result['userId'] = $id;
    $result['username'] = $username;
    $result['friends'] = $friends;
    $result['groups'] = $groups;

    return $result;
}

--- 
+++ 
@@ -14,7 +14,7 @@
     return $result['get_user_hash'];
 }
 
-function getUserInfo($id) {
+function getUserSidebarInfo($id) {
     global $conn;
     $stmt = $conn->prepare("SELECT Member.name FROM Member WHERE Member.id = ?");
     $stmt->execute(array($id));
@@ -28,10 +28,28 @@
     $stmt->execute((array($id)));
     $groups = $stmt->fetchAll();
 
+    $userHash = getUserHash($id);
+
     $result['userId'] = $id;
     $result['username'] = $username;
+    $result['userHash'] = $userHash;
     $result['friends'] = $friends;
     $result['groups'] = $groups;
 
     return $result;
 }
+
+function getUserNavbarInfo($id) {
+    global $conn;
+    $stmt = $conn->prepare("SELECT Member.name FROM Member WHERE Member.id = ?");
+    $stmt->execute(array($id));
+    $username = $stmt->fetchAll()[0];
+
+    $userHash = getUserHash($id);
+
+    $result['userId'] = $id;
+    $result['username'] = $username;
+    $result['userHash'] = $userHash;
+
+    return $result;
+}
Rename getUserInfo function to getUserSidebarInfo.

Add getUserNavbarInfo function.
