multiple_file_upload.php

for($i=0; $i<count($_FILES['file']['name']); $i++) {

    $tmpFilePath = $_FILES['file']['tmp_name'][$i];
    $shortname = $_FILES['file']['name'][$i];
    $filename = date('YmdHis').$_FILES['file']['name'][$i];
    $filePath = "./public/course_work/".$filename;
    $ext = pathinfo($_FILES['file']['name'][$i], PATHINFO_EXTENSION);

    $file = basename($shortname,".".$ext);


    if(move_uploaded_file($tmpFilePath, $filePath))
    {
      //do something...   
    }
}