我試圖使用PHP5的SimpleXML創造了iTunes播客的有效進:將rss xmlns命名空間定義添加到php的simplexml文檔中?
<?php
$xml_string = <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<channel>
</channel>
XML;
$xml_generator = new SimpleXMLElement($xml_string);
$tnsoundfile = $xml_generator->addChild('title', 'Main Title');
$tnsoundfile->addChild('itunes:author', "Author", ' ');
$tnsoundfile->addChild('category', 'Audio Podcasts');
$tnsoundfile = $xml_generator->addChild('item');
$tnsoundfile->addChild('title', 'The track title');
$enclosure = $tnsoundfile->addChild('enclosure');
$enclosure->addAttribute('url', 'http://test.com');
$enclosure->addAttribute('length', 'filelength');
$enclosure->addAttribute('type', 'audio/mpeg');
$tnsoundfile->addChild('itunes:author', "Author", ' ');
header("Content-Type: text/xml");
echo $xml_generator->asXML();
?>
它不驗證,因爲我得放線:
<rss xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" version="2.0">
按http://www.apple.com/itunes/podcasts/specs.html。
所以輸出應該是:
<?xml version="1.0" encoding="UTF-8"?>
<rss xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" version="2.0">
<channel>
等我已經一遍又一遍地手動和論壇,就不能得到它的權利。如果我說,頁腳附近:
header("Content-Type: text/xml");
echo '<rss xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" version="2.0">';
echo $xml_generator->asXML();
?>
然後,它看起來有點權在Firefox,並沒有抱怨未定義的命名空間了,但供稿驗證抱怨
line 1, column 77: XML parsing error: :1:77: xml declaration not at start of external entity [help]
因爲文檔現在開始:
<rss xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" version="2.0"><?xml version="1.0" encoding="UTF-8"?>
,而不是
<?xml version="1.0" encoding="UTF-8"?><rss xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" version="2.0">