PHP SimpleXML recursive function to list children and attibutes
- by Phill Pafford
I need some help on the SimpleXML calls for a recursive function that lists the elements name and attributes. Making a XML config file system but each script will have it's own config file as well as a new naming convention. So what I need is an easy way to map out all the elements that have attributes, so like in example 1 I need a simple way to call all the processes but I don't know how to do this without hard coding the elements name is the function call. Is there a way to recursively call a function to match a child element name? I did see the xpath functionality but I don't see how to use this for attributes. Any ideas?
Also does the XML in the examples look correct? can I structure my XML like this?
Example 1:
<application>
<processes>
<process id="123" name="run batch A" />
<process id="122" name="run batch B" />
<process id="129" name="run batch C" />
</processes>
<connections>
<databases>
<database usr="test" pss="test" hst="test" dbn="test" />
</databases>
<shells>
<ssh usr="test" pss="test" hst="test-2" />
<ssh usr="test" pss="test" hst="test-1" />
</shells>
</connections>
</application>
Example 2:
<config>
<queues>
<queue id="1" name="test" />
<queue id="2" name="production" />
<queue id="3" name="error" />
</queues>
</config>
Pseudo code:
// Would return matching process id
getProcess($process_id) {
return the process attributes as array that are in the XML
}
// Would return matching DBN (database name)
getDatabase($database_name) {
return the database attributes as array that are in the XML
}
// Would return matching SSH Host
getSSHHost($ssh_host) {
return the ssh attributes as array that are in the XML
}
// Would return matching SSH User
getSSHUser($ssh_user) {
return the ssh attributes as array that are in the XML
}
// Would return matching Queue
getQueue($queue_id) {
return the queue attributes as array that are in the XML
}
EDIT:
Can I pass two parms? on the first method you have suggested @Gordon
public function findProcessById($id, $name)
{
$attr = false;
$el = $this->xml->xpath("//process[@id='$id']"); // How do I also filter by the name?
if($el && count($el) === 1) {
$attr = (array) $el[0]->attributes();
$attr = $attr['@attributes'];
}
return $attr;
}
