Uploading Multiple Files to Location and Updated Database - php

Question

I have been working on a multi-image upload function that I can't seem to make work. It currently will only work if I have a single image uploaded. I can't figure out what is going wrong with this script.
This is the function to upload images:
if(isset($_POST["btnSubmit"])){
$errors = array();
$extension = array("jpeg","jpg","png","gif");
$bytes = 1000000;
$allowedKB = 10485760000;
$totalBytes = $allowedKB * $bytes;
$imgDir = "assets/users/".$userLoggedIn."/images/";
if(isset($_FILES["files"])==false)
{
echo "<b>Please, Select the files to upload!!!</b>";
return;
}
foreach($_FILES["files"]["tmp_name"] as $key=>$tmp_name)
{
$uploadThisFile = true;
$file_name=$_FILES["files"]["name"][$key];
$file_tmp=$_FILES["files"]["tmp_name"][$key];
$ext=pathinfo($file_name,PATHINFO_EXTENSION);
if(!in_array(strtolower($ext),$extension))
{
array_push($errors, "File type is invalid. Name:- ".$file_name);
$uploadThisFile = false;
}
if($_FILES["files"]["size"][$key] > $totalBytes){
array_push($errors, "File size is too big. Name:- ".$file_name);
$uploadThisFile = false;
}
if($uploadThisFile){
$filename = basename($file_name,$ext);
$newFileName = uniqid().$filename.$ext;
move_uploaded_file($_FILES["files"]["tmp_name"][$key],$imgDir.$newFileName);
// current date and time
$date_added = date("Y-m-d H:i:s");
$imagePath = $imgDir.$newFileName;
$query = "INSERT INTO images(date_added, added_by, image, deleted) VALUES('$date_added', '$userLoggedIn','$imagePath', 'no')";
mysqli_query($con, $query);
}
}
header("Location: edit-images.php");
$count = count($errors);
if($count != 0){
foreach($errors as $error){
echo $error."<br/>";
}
}
}
?>
I thought the issue might be with size but I cut the condition to prevent it from uploading with no luck. I feel like I might be missing something in the foreach but I am completely stuck. I appreciate your help!
Here is the form I am using to upload:
<form method="post" enctype="multipart/form-data" name="formUploadFile" id="uploadForm" action="edit-images.php">
<div class="form-group">
<label for="exampleInputFile">Select file to upload:</label>
<input type="file" id="exampleInputFile" name="files[]" multiple="multiple">
<p class="help-block"><span class="label label-info">Note:</span> Please, Select the only images (.jpg, .jpeg, .png, .gif)</p>
</div>
<button type="submit" class="btn btn-primary" name="btnSubmit" >Start Upload</button>
</form>