Check file exist on UploadiFive - php

Question

I downloaded this upload example: https://github.com/xmissra/UploadiFive
When sending an apernas file, it works perfectly but when sending more than one file the function that checks if the file already exists presents a problem. Apparently the loop does not ignore that the file has just been sent and presents the message asking to replace the file. Is there any way to solve this?
This is the function that checks if the file already exists.
$targetFolder = 'uploads'; // Relative to the root and should match the upload folder in the uploader
script
if (file_exists($targetFolder . '/' . $_POST['filename'])) {
echo 1;
} else {
echo 0;
}
You can test the upload working at: http://inside.epizy.com/index.php
*Submit a file and then send more than one to test.
I tried it this way but it didn't work:
$targetFolder = 'uploads';
$files = array($_POST['filename']);
foreach($files as $file){
if (file_exists($targetFolder . '/' . $file)) {
echo 1;
} else {
echo 0;
}

Answer 1

When you have multiple files to be uploaded keep these things in mind;
HTML
Input name must be array name="file[]"
Include multiple keyword inside input tag.
eg; <input name="files[]" type="file" multiple="multiple" />
PHP
Use syntax $_FILES['inputName']['parameter'][index]
Look for empty files using array_filter()
$filesCount = count($_FILES['upload']['name']);
// Loop through each file
for ($i = 0; $i < $filesCount; $i++) {
// $files = array_filter($_FILES['upload']['name']); use if required
if (file_exists($targetFolder . '/' . $_FILES['upload']['name'][$i])) {
echo 1;
} else {
echo 0;
}
}