fix `undefined array key "lan"` error

was getting the following error from a clean build using php 8.1.2: ```"Warning: Undefined array key "lan" in ~/thebookofshaders/header.php on line 4"``` Was going to use `isset` but it seems like a banged `!empty` is used elsewhere. am not a php dev so will defer to anyone who feels more confident.
2022-02-11 13:18:55 -05:00 · 2022-02-11 13:18:55 -05:00 · a4e0819cbc
parent 036c0c64f0
commit a4e0819cbc
1 changed files with 1 additions and 1 deletions
--- a/header.php
+++ b/header.php
@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <?php
    $html_attributes = "";
-    if ($_GET['lan'] == "fa") {
+    if (!empty($_GET['lan']) && $_GET['lan'] == "fa") {
        $html_attributes = 'dir="rtl" lang="fa"';
    }
    echo '