Website refactoring

Moved PHP files to "lib" folder
Moved Javascript files to "lib" folder
Moved login page inline CSS to "login.css"
Moved database functions to class "Database"
Removed the html template, compensated with a direct HTML code inside PHP "else" statement

lib/php/login.php

@@ -3,8 +3,8 @@
         header ( "Location: " . substr ( $_SERVER [ 'SCRIPT_NAME' ], 0, -10 ) . "/insert" );
         exit;
     }
-    if ( isset ( $session [ 1 ] ) && $session [ 1 ] == "forgot" ) {
-        include ( $config [ 'installation_path ' ] . '/lib/php/forgotpassword.php' );
+    if ( isset ( $request [ 1 ] ) && $request [ 1 ] == "forgot" ) {
+        include ( $config [ 'installation_path' ] . '/lib/php/forgot.php' );
         exit;
     }
     if ( isset ( $_POST [ 'username' ] ) && isset ( $_POST [ 'password' ] ) ) {
@@ -49,7 +49,7 @@
         <title>BJPHoster URL Shortener | Login</title>
         <link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet">
         <link href="<?=substr($_SERVER['SCRIPT_NAME'],0,-10)?>/lib/css/login.css" rel="stylesheet">
-        <link href="favicon.ico" rel="icon" type="image/x-icon">
+        <link href="<?=substr($_SERVER['SCRIPT_NAME'],0,-10)?>/favicon.ico" rel="icon" type="image/x-icon">
     </head>
     <body>
     <div class="container login-container">
@@ -74,8 +74,8 @@
         </div>
         <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
-        <script src="js/sha512.min.js"></script>
-        <script src="js/login.js"></script>
+        <script src="<?=substr($_SERVER['SCRIPT_NAME'],0,-10)?>/lib/js/sha512.min.js"></script>
+        <script src="<?=substr($_SERVER['SCRIPT_NAME'],0,-10)?>/lib/js/login.js"></script>
         <script>var script_name = "<?=substr($_SERVER['SCRIPT_NAME'],0,-10)?>";</script>
     </body>
 </html>