Question

I have a content management system (Omeka) which is built on the Zend framework. There’s pages on the site which have different output options such as XML and JSON.

I’m able to validate the output from the site. And when I save the XML files as a .xml file on my server, my code is able to load it. But when I reference the URL of the XML file generated by the script, the PHP returns an error. Although it returns a 404, I can put the URL I’m trying to load into my browser and I will see the proper XML page.

The script I’m loading: http://lw4.gc.cuny.edu/_dev_push/archive/items/show/1?output=omeka-xml.

Here is the code I’m using to try and load the files. I’m just trying a series of methods to see if any of them work. I’d prefer to use the SimpleXML method if it can be done:

    $xml = simplexml_load_file('http://lw4.gc.cuny.edu/_dev_push/archive/items/show/id/1?output=omeka-xml');
    $doc = new DOMDocument();
    $doc->loadXML('http://lw4.gc.cuny.edu/_dev_push/archive/items/show/id/1?output=omeka-xml');
    echo $doc->saveXML();

    $str = file_get_contents('http://lw4.gc.cuny.edu/_dev_push/archive/items/show/id/1?output=omeka-xml');
    echo $str; 

Here are the errors that my script returns when I type in the exact URL of the dynamically generated XML page.

Warning:
simplexml_load_file(http://lw4.gc.cuny.edu/_dev_push/archive/items/show/id/1?output=omeka-xml):
failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in
/var/www/html/_dev_push/wp-content/plugins/omekafeed/omekafeed.php on
line 122 Warning: simplexml_load_file(): I/O warning : failed to load
external entity
“http://lw4.gc.cuny.edu/_dev_push/archive/items/show/id/1?output=omeka-xml”
in /var/www/html/_dev_push/wp-content/plugins/omekafeed/omekafeed.php
on line 122 Warning: DOMDocument::loadXML(): Start tag expected, ‘<‘
not found in Entity, line: 1 in
/var/www/html/_dev_push/wp-content/plugins/omekafeed/omekafeed.php on
line 124 Warning:
file_get_contents(http://lw4.gc.cuny.edu/_dev_push/archive/items/show/id/1?output=omeka-xml):
failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in
/var/www/html/_dev_push/wp-content/plugins/omekafeed/omekafeed.php on
line 127

The scripts do load when I specify the URLs in this fashion. Note that in this case text3.xml isn’t generate dynamically with a script, but it is identical to the xml file called in the previous example.

    $xml = simplexml_load_file('http://lw4.gc.cuny.edu/_dev_push/archive/test3.xml');
    $doc = new DOMDocument();
    $doc->loadXML('http://lw4.gc.cuny.edu/_dev_push/archive/test3.xml');
    echo $doc->saveXML();

    $str = file_get_contents('http://lw4.gc.cuny.edu/_dev_push/archive/test3.xml');
    echo $str;

There are no passwords protecting the part of the site I’m using. I’m working on the same domain, although it’s worth pointing out that I’m trying to pull the XML content from a separate content management system into another one [that is in a subdirectory of the first one].

As I can get these scripts to work when I specify a hardcoded, but identical XML file, my suspicion is that it is the fact that the dynamic XML files are generated by Zend which is the problem, but I couldn’t find any reference to this feature, or how to change it.

What do you think, what can I do to make this content load so I can parse it with my PHP script?

Answer 1

I have a content management system (Omeka) which is built on the Zend
framework. There’s pages on the site which have different output
options such as XML and JSON.

Read the docs and see if you can find out how to access these resources using a REST request. If you can do that, you can then put the returned XML or JSON into whatever form you need.

Otherwise you may need to scrape the page with something like cURL() and then put the results into the form you need.