Condition to Skip Input field if Empty - php

Question

I'm trying to set a condition wherein if the 'filefield' is empty, it will skip the insert in DB as it is only an option and just proceed in inserting of 'name' and 'description' in the DB, which will never be empty.
<?php
include("connection.php");
if (isset($_POST['submit']))
{
$name = mysqli_real_escape_string($conn, $_POST['name']);
$description = mysqli_real_escape_string($conn, $_POST['description']);
if ($name == '' || $description == '' )
{
$error = 'ERROR: Please fill required fields!';
renderForm($name, $description);
}
else
{
if(!empty($_FILES['filefield'])){
if(isset($_FILES['filefield'])){
$file=$_FILES['filefield'];
$upload_directory='uploads/';
$ext_str = "gif,jpg,jpeg,mp3,tiff,bmp,doc,docx,ppt,pptx,txt,pdf";
$allowed_extensions=explode(',',$ext_str);
$ext = substr($file['name'], strrpos($file['name'], '.') + 1);
if (!in_array($ext, $allowed_extensions) )
{
echo '<script language="javascript">';
echo 'alert("file type not allowed for upload")';
echo '</script>';
exit();
}
$path=md5(microtime()).'.'.$ext;
if(move_uploaded_file($file['tmp_name'],$upload_directory.$path)){
$filefield = $_FILES["filefield"]["name"];
$path = $path."/".$filefield;
}
}
}
}
if (!empty($_FILES['filefield']) || !isset($_FILES['filefield'])) {
$query = "INSERT INTO `item`(`name`, `description`, `path`) VALUES ('$name','$description','$path')";
}
else {
$query = "INSERT INTO `item`(`name`, `description`) VALUES ('$name','$description')";
}
$result = mysqli_query($conn, $query);
if($result)
{
echo '<script language="javascript">';
echo 'alert("Success!")';
echo '</script>';
exit();
}
}
?>
I'm not sure how to proceed with the condition. Any help is highly appreciated.

Answer 1

First, close off all of your logic, including if(move_uploaded_file), so that the $query is competely outside of any conditionals. Then it's just a matters of checking whether the filefield was filled out or not. If it's not empty, your $query insert all three fields. If it is, your $query only inserts $name and $description.
This can be seen in the following (heavily cut-down) code:
/* Existing logic */
else
{
if (!empty($_FILES['filefield'])) {
if (isset($_FILES['filefield'])) {
if (move_uploaded_file($file['tmp_name'], $upload_directory.$path)) {
...
$path = $path."/".$filefield;
}
}
}
}
/* Modified logic */
if (!empty($_FILES['filefield']) || !isset($_FILES['filefield'])) {
$query = "INSERT INTO `item`(`name`, `description`, `path`) VALUES ('$name','$description','$path')";
}
else {
$query = "INSERT INTO `item`(`name`, `description`) VALUES ('$name','$description')";
}
$result = mysqli_query($conn, $query);