PHP-da ichki XML teglari

Endi bizda ichki teg bo'lsin:

test.xml<root>
  <tag>
    <elem>matn</elem>
  </tag>
</root>

Keling, ichki tegning qiymatini olaylik. Buning uchun murojaatlar zanjirini bajarish kerak:

php<?php
  echo $xml->tag->elem; // 'matn'
?>

html<root>
  <tag1>
    <tag2>
      <tag3>
        matn
      </tag3>
    </tag2>
  </tag1>
</root>