<?php
$upload = 'err';
if(!empty($_FILES['file'])){
// File upload configuration
$targetDir = "uploads/";
$allowTypes = array('pdf', 'doc', 'docx', 'jpg', 'png', 'jpeg', 'gif');
$fileName = basename($_FILES['file']['name']);
$targetFilePath = $targetDir.$fileName;
// Check whether file type is valid
$fileType = pathinfo($targetFilePath, PATHINFO_EXTENSION);
if(in_array($fileType, $allowTypes)){
// Upload file to the server
if(move_uploaded_file($_FILES['file']['tmp_name'], $targetFilePath)){
$upload = 'ok';
}
}
}
echo $upload;
?>