$header = null;
$pcs = array();
if (($handle = fopen($filename, 'rb')) !== false) { // opening using rb is binary safe, not necessary just safer in this multi-byte emoji world
    while (($row = fgetcsv($handle)) !== false ) { // don't need to define the length of delimiter if you're just on the defaults
        // just a quick way to skip over the header row
        if (is_null($header)) {
            $header = $row;
            continue; // continue will skip the rest of the logic in this loop iteration, but not break out of the loop
        }
        list($ip, $side, $pos) = $row; // get the first three values from the $row array and assign them to variables
//	print_r($row);
//	$ip = $row[0];
//	$side = $row[1];
//	$pos = $row[2];
        if (empty($side)) { // empty checks for null, 0 or empty string values
            continue;
        }

	$pcs[$ip] = $ip; // and then assign them into an associative array, using the array key as the code and the value as the name
	$pcs[$pos] = $pos; // and then assign them into an associative array, using the array key as the code and the value as the name
	$pcs[$side] = $side;

	print_r($pcs);
    }

    fclose($handle);
}