Daten einlesen Index-Seite

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  <title>Datenaktualiserung</title>
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    <h2>Daten vom Open-Data-Server einlesen</h2>
    <a href="https://www.schulministerium.nrw.de/BiPo/OpenData/Schuldaten/" target="_blank">Datenserver</a>
    <h3>Aktuelle Daten</h3>
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      <a class="list-group-item list-group-item-action" href="read_data.php?s=1">Schuladressen aktiver Schulen</a>
      <a class="list-group-item list-group-item-action" href="read_data.php?s=9">Schülerzahlen</a>
      <a class="list-group-item list-group-item-action" href="read_data.php?s=6">Kursbildung in der Oberstufe</a>
      <a class="list-group-item list-group-item-action" href="read_data.php?s=10">Bilinguale Angebote</a>
      <a class="list-group-item list-group-item-action" href="read_data.php?s=2">Schulträger</a>
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    <h3>Referenztabellen</h3>
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      <a class="list-group-item list-group-item-action" href="read_data.php?s=4">Schulformschlüssel</a>
      <a class="list-group-item list-group-item-action" href="read_data.php?s=3">Betriebsschlüssel</a>
      <a class="list-group-item list-group-item-action" href="read_data.php?s=7">Fächerschlüssel</a>
      <a class="list-group-item list-group-item-action" href="read_data.php?s=5">Rechtsformschlüssel</a>
      <a class="list-group-item list-group-item-action" href="read_data.php?s=11">Unterrichtsspracheschlüssel</a>
      <a class="list-group-item list-group-item-action" href="read_data.php?s=8">Gemeindeschlüssel</a>
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