我想創建一個 html 塊，如下所示：<media>    <media-reference source='15.jpg' />    <media-caption>caption</media-caption>    <hasSyndicationRights>1</hasSyndicationRights>    <licenseId>1</licenseId>    <licensorName>name</licensorName></media>但是在我的代碼中<media-reference>是這樣關閉的</media-reference>。我怎樣才能關閉那個標簽？這是我的代碼：$valFieldBody = '<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Odio labore aut hic soluta! Animi quaerat unde commodi minus dicta, a quidem. Soluta quaerat delectus, id, dolor ex placeat molestiae quae.</p><p><img  height="500" src="15.jpg" width="500"/></p>';$htmlEncoded = mb_convert_encoding($valFieldBody, 'HTML-ENTITIES', 'UTF-8');$doc = new DOMDocument;$opcionesLibXML = LIBXML_COMPACT | LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD;libxml_use_internal_errors(true);@$doc->loadHTML($htmlEncoded, $opcionesLibXML);libxml_use_internal_errors(false);$img_tag = $doc->getElementsByTagName('img');foreach ($img_tag as $key => $img_items){    $img_src = $img_items->getAttribute('src');    $tag_media = $doc->createElement('media');    $tag_media_reference = $doc->createElement('media-reference');    $tag_media_reference->setAttribute('mime-type','image/jpg');    $tag_media_reference->setAttribute('source',$img_src);    $tag_media_caption = $doc->createElement('media-caption',$img_title);    $tag_hasSyndicationRights = $doc->createElement('hasSyndicationRights','1');    $tag_licenseId = $doc->createElement('licenseId','1');    $tag_licensorName = $doc->createElement('licensorName',$img_title);    $tag_media->appendChild($tag_media_reference);    $tag_media->appendChild($tag_media_caption);    $tag_media->appendChild($tag_hasSyndicationRights);    $tag_media->appendChild($tag_licenseId);    $tag_media->appendChild($tag_licensorName);    $img_items->parentNode->replaceChild($tag_media, $img_items);}$valFieldBody = $doc->saveHTML($doc->documentElement);現在我str_replace用來改變它：$valFieldBody = str_replace("></media-reference>"," />", $valFieldBody);