A lot of code cleanup and code sanitation done.

pub/login/php/authFunctions.php

@@ -1,6 +1,6 @@
 <?php
 
-include_once $_SERVER['DOCUMENT_ROOT'] . '/bin/php/db_connect.php';
+require_once "{$_SERVER['DOCUMENT_ROOT']}/bin/php/db_connect.php";
 function checkLoginAttempts()
 {
     $stmt = $GLOBALS['conn']->prepare("SELECT address 
@@ -91,7 +91,7 @@ function loginUser($user_uuid)
     setSessionParams();
 }
 
-# link the verification code input and check if its an valid code.
+# link the verification code input and check if it's a valid code.
 function linkVerificationPosts()
 {
     $codeParts = [];