<?php
session_start();
include_once 'connection.php';
$id = $_SESSION['user_id'];
if(isset($_POST['emailChange']) || isset($_POST['descChange'])){
       $desc = $_POST['descChange'];
       $email = $_POST['emailChange'];
       if(empty($email)){
           $query = "UPDATE users SET description = :descr WHERE user_id= :id ;";
           $stmt = $conn->prepare($query);
           $stmt->bindParam(":descr", $desc);
       } else if(empty($desc)){
           $query = "UPDATE users SET user_email= :email WHERE user_id= :id ;";
           $stmt = $conn->prepare($query);
           $stmt->bindParam(":email", $email);
       } else{
           $query = "UPDATE users SET description = :descr AND user_email = :email WHERE user_id= :id;";
           $stmt = $conn->prepare($query);
           $stmt->bindParam(":email", $email);
           $stmt->bindParam(":descr", $desc);
       }
       if(!filter_var($email, FILTER_VALIDATE_EMAIL)){
           header("Location: ../profile.php?error=invalidEmail");
           exit();
       }
           $stmt->bindParam(":id", $id);
           $stmt->execute();
   }

<form action="assets/upload.php" method="POST">
     <input type="text" name="emailChange" class="inputs" id="changeEmail" placeholder = "Enter your new E-mail">
     <input type="text" name="descChange" class="inputs" id="changeDesc" placeholder="Enter your description">
     <button type="submit" id="btnconfirmCreds" name="changeCreds">Confirm Changes</button>
 </form>

[user_id][user_username][user_email][user_password][role_id][user_image][description][num_of_posts]