<?php

$dataname = "e2fi1.csv";

$fp = fopen($dataname, "r");

//first line of csv is header, needs to be read out seperately
//fgetcsv macht automatisch weiter bei der nächsten Zeile, merkt sich wo der pointer steht
$row_header = fgetcsv($fp, null, ";");
$row_header_nummer = $row_header[0];
$row_header_vorname = $row_header[1];
$row_header_nachname = $row_header[2];

//create XML
$xml_doc = new DOMDocument('1.0', 'utf-8');
$xml_doc->formatOutput = true;

//build XML file with root element
$xml_root = $xml_doc->createElement('klasse_e2fi1');
$xml_doc->appendChild($xml_root);

//create string from CSV
while (!feof($fp)) {
    $row_a = fgetcsv($fp, null, ";");

    if (empty($row_a)) {
        continue;
    }

    $schueler_nummer = $row_a[0];
    $schueler_vorname = $row_a[1];
    $schueler_nachname = $row_a[2];

    //create sub element for students
    $xml_student = $xml_doc->createElement('schueler');
    $xml_student->setAttribute("nr", $schueler_nummer);
    $xml_root->appendChild($xml_student);

    //create element that fills the
    $xml_vorname = $xml_doc->createElement($row_header_vorname, $schueler_vorname);
    $xml_student->appendChild($xml_vorname);

    $xml_nachname = $xml_doc->createElement($row_header_nachname, $schueler_nachname);
    $xml_student->appendChild($xml_nachname);
}

$xml_filename = "klasse1fi1.xml";
$xml_doc->save($xml_filename);