Basic .php coding question

Question

Please have mercy on this utter noob with .php coding.
Situation:
People submit their data forms, which I receive like this:
These include a results file, here called 'Output.txt' which is required and optionally include 'Output-MPE.txt'.
When I receive both files, the last five fields are extracted from both these files. To achieve that I use the following code:
function makeupFiveFieldValues( $recordID ){
    if( !isset($_FILES) )
        return ;
    $resultFile = $_FILES[ "field_27" ][ "tmp_name" ] ;
    $mpeFile    = $_FILES[ "field_28" ][ "tmp_name" ] ;
    if( is_uploaded_file( $resultFile ) && is_uploaded_file( $mpeFile )  ) {
        $line = join("",file($resultFile));
        list( $io, $dvd, $h264, $mpeOn ) = split(',',str_replace('"','', $line));
        $line = join("",file($mpeFile));
        list( $io, $dvd, $h264, $mpeOff ) = split(',',str_replace('"','', $line));
        $_POST['field_29'] = $io;
        $_POST['field_30'] = $dvd;
        $_POST['field_31'] = $h264;
        $_POST['field_32'] = $mpeOn;
        $_POST['field_33'] = $mpeOff;
However:
When I only receive 'Output.txt' and not 'Output-MPE.txt', this code does not extract the correct data from the first file and shows up like this:
Being an utter noob with .php coding, I can only assume this is caused by the statement:
    if( is_uploaded_file( $resultFile ) && is_uploaded_file( $mpeFile )  )
which apparently assumes both files need to be submitted. But if only 'Output.txt' has been submitted, it still needs to extract the first 4 values from the submitted file. How do I need to change the code?

Answer 1

If your assumption is correct, try changing the && to ||, this changes it from "and" to "or"
Gary