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// Allowed file types
$allowedTypes = [
    'image/png',
    'image/jpeg',
    'application/pdf',
    'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
    'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
    'application/vnd.openxmlformats-officedocument.presentationml.presentation',
    'text/plain',
    'text/csv'
];

// Maximum file size
$maxFileSize = 5 * 1024 * 1024; // (5 MB)

// Target directory
$targetDirectory = $_SERVER['DOCUMENT_ROOT'] . '/';

try {

	// Sanitize file name
	$fileName = nuSanitizeFilename(basename($_FILES['file']['name']));

	// Check file size
	if ($_FILES['file']['size'] > $maxFileSize) {
		throw new Exception('Exceeded file size limit');
	}

	// Check file type
	$finfo = new finfo(FILEINFO_MIME_TYPE);
	if (!in_array($finfo->file($_FILES['file']['tmp_name']), $allowedTypes)) {
		throw new Exception('Invalid file type');
	}

	// Build target file path
	$targetFile = $targetDirectory . $fileName;

    if (move_uploaded_file($_FILES['file']['tmp_name'], $targetFile)) {
        $data = ['url' => $targetFile, 'file' => $fileName, 'message' => 'The file ' . $fileName . ' has been uploaded.'];
        http_response_code(201);
        $result = json_encode($data);
    }
    else {
        throw new Exception(nuTranslate('Unable to move the uploaded file to its final location:') . $targetFile);
    }

} catch(\Throwable $th) {

    $result = nuSetUploadError('Sorry, there was an error uploading your file.');

}

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$targetDirectory = $_SERVER['DOCUMENT_ROOT'] . '/'

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$targetDirectory = '../uploads/';