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<?php
$num_files = 2;
// ********* BEGIN FORM SUBMIT PROCESS *************
//if the form has been submitted, then do the upload process, infact, if you clicked on (Upload Now!) button.
if (isset($_POST['upload_form'])){
echo "<h3>Upload results:</h3>";

//do a loop for uploading files based on ($num_files) number of files.
for ($i = 1; $i <= $num_files; $i++) {

           //define variables to hold the values.
           $new_file = $_FILES['file'.$i];
           $file_name = $new_file['name'];
           //to remove spaces from file name we have to replace it with "_".
           $file_name = str_replace(' ', '_', $file_name);
           
           $file_tmp = $new_file['tmp_name'];
           $file_size = $new_file['size'];

           #-----------------------------------------------------------#
           # this code will check if the files was selected or not.    #
           #-----------------------------------------------------------#

			if (!is_uploaded_file($file_tmp)) {
                //print error message and file number.
              echo "File $1: Nothing selected. Please upload a stylesheet along with a .jpg preview.<br>";
              } else {
?>