RDF XML not parsing

Ocala

Hello... I'm having the same problem, but unfortunately the fix below didn't help mine. Here's the top level code:

<?php

header ("Content-type: application/rdf+xml");
echo ("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");

(there is also an extra line at the top of the code, causing this error: XML Parsing error: <unknown>:2:0: xml declaration not at start of external entity)

Thanks for any help!

Chris_Evans

I maybe wrong but:

echo chr(60).chr(63)."xml version".chr(61)."\"1.0\" encoding".chr(61)."\"UTF".chr(45)."8".chr(63).chr(62);

Ocala

Thanks Chris, that seems to have done some good. I'm still getting the extra line at the top of the file though, and that's screwing everything else up.

I've checked the config.php file and removed an extra line that was there, but that hasn't stopped it from adding one in anyway.

Thanks, I'll see if I can find the reason why it's adding the line, and report back!

robert_w_ark

Ocala - do this

<?php

header ("Content-type: application/rdf+xml");
echo ("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");

replace with this

<?php

header ('Content-type: application/rdf+xml');
echo <?xml version=\"1.0\" encoding=\"UTF-8\"?>\n;

BUT - Replace all the foreign characters above using the chr() function - visit www.asciitable.com for the complete list. This should work 🙂 (Just dont replace the '(' and ')' and ';' then it will work fine)

Ocala

Thanks Robert, unfortunately it's still not validating, for the same reasons. Here's the full code, would you mind taking a look?

<?php

header ('Content-type: application/rdf+xml');
echo chr(60).chr(63)."xml version".chr(61)."\"1.0\" encoding".chr(61)."\"UTF".chr(45)."8".chr(63).chr(62);

?>
<rdf:RDF xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:h="http://www.w3.org/1999/xhtml"
xmlns:hr="http://www.w3.org/2000/08/w3c-synd/#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns="http://purl.org/rss/1.0/">
<channel rdf:about="http://www.foo.com/news/news.php">
<title>Latest Info</title>
<description>Browse the latest.</description>
<link>http://www.foo.com</link>
</channel>

<?php
include("../admin/config.php");
$sql = "SELECT category, adtext, id FROM classifieds WHERE postdate >= NOW() - INTERVAL 2 DAY AND status = 'a' ORDER BY RAND() DESC LIMIT 3";

$result = mysql_query($sql, $conn) or die (mysql_error());
while ($row = mysql_fetch_array ($result)) {
echo (" <item rdf:about=\"http://www.foo.com\">
<title>");
echo $row[category];
echo ("</title>
<description>");
echo $row[adtext];
echo ("</description>
<link>http://www.foo.com/post/contact-seller");
echo (".php?id=");
echo $row[id];
echo ("</link>
</item>\n\n");
}

mysql_free_result ($result);
?></rdf:RDF>

Thanks All!

Weedpacket

Here's a rewritten version that might be a bit easier to read (and therefore debug):

<?php header('Content-Type: application/rdf+xml');?>
<?xml version="1.0" encoding="UTF-8"?>
<rdf:RDF xmlns:dc="http://purl.org/dc/elements/1.1/"
	xmlns:h="http://www.w3.org/1999/xhtml"
	xmlns:hr="http://www.w3.org/2000/08/w3c-synd/#"
	xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
	xmlns="http://purl.org/rss/1.0/">
<channel rdf:about="http://www.example.com/news/news.php">
	<title>Latest Info</title>
	<description>Browse the latest.</description>
	<link>http://www.example.com</link>
</channel>
<?php
include("../admin/config.php");
$sql = "SELECT category, adtext, id
FROM classifieds
WHERE postdate >= NOW() - INTERVAL 2 DAY
      AND status = 'a'
ORDER BY RAND() DESC
LIMIT 3";
$result = mysql_query($sql, $conn) or die (mysql_error());
while ($row = mysql_fetch_array ($result)) {
?>
<item rdf:about="http://www.example.com">
	<title><?php echo $row['category']?></title>
	<description><?php echo $row['adtext']?></description>
	<link>http://www.example.com/post/contact-seller.php?id=<?php echo $row['id']?></link>
</item>

<?
}
mysql_free_result ($result);
?>
</rdf:RDF>

That at least produces valid XML (assuming the contents of
$row['category'], $row['adtext'] etc., are themselves valid: they should
probably be run through [man]htmlspecialchars[/man] first just in case there's
an & or something in them somewhere).

But what is the content of this "extra
line"? Here's an awful rude hack that may give some results: Put a line at the end reading
<?php header('Content-Type: text/html');?>
The exact header is unimportant, what's important is the error message that results (assuming there is no output buffering specified). That error message will tell you which line of which script generated the very first bit of content in the XML page - in other words, the extra line that shouldn't be there.

And this really should have been started in a new thread.