Deprecate is_empty()

app.php

@@ -13,7 +13,7 @@ if ($_SESSION['loggedin'] != true) {
 require_once __DIR__ . "/pages.php";
 
 $pageid = "home";
-if (isset($_GET['page']) && !is_empty($_GET['page'])) {
+if (!empty($_GET['page'])) {
     $pg = strtolower($_GET['page']);
     $pg = preg_replace('/[^0-9a-z_]/', "", $pg);
     if (array_key_exists($pg, PAGES) && file_exists(__DIR__ . "/pages/" . $pg . ".php")) {
@@ -68,7 +68,7 @@ header("Link: <static/js/bootstrap.bundle.min.js>; rel=preload; as=script", fals
         if (!empty($_GET['msg'])) {
             if (array_key_exists($_GET['msg'], MESSAGES)) {
                 // optional string generation argument
-                if (!isset($_GET['arg']) || is_empty($_GET['arg'])) {
+                if (empty($_GET['arg'])) {
                     $alertmsg = $Strings->get(MESSAGES[$_GET['msg']]['string'], false);
                 } else {
                     $alertmsg = $Strings->build(MESSAGES[$_GET['msg']]['string'], ["arg" => strip_tags($_GET['arg'])], false);

index.php

@@ -47,7 +47,7 @@ if (Login::checkLoginServer()) {
                         $username_ok = true;
                         break;
                     default:
-                        if (!is_empty($error)) {
+                        if (!empty($error)) {
                             $alert = $error;
                         } else {
                             $alert = $Strings->get("login error", false);

mobile/index.php

@@ -75,7 +75,7 @@ if (mobile_enabled() !== TRUE) {
 }
 
 // Make sure we have a username and access key
-if (is_empty($VARS['username']) || is_empty($VARS['key'])) {
+if (empty($VARS['username']) || empty($VARS['key'])) {
     http_response_code(401);
     die(json_encode(["status" => "ERROR", "msg" => "Missing username and/or access key."]));
 }

required.php

@@ -133,6 +133,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
 }
 
 /**
+ * @deprecated
  * Checks if a string or whatever is empty.
  * @param $str The thingy to check
  * @return boolean True if it's empty or whatever.