Checking if a node exists

[Arkane]

Hey,

 

I've made a script to get data from another page which uses DOMDocument.  It works, but only if all of the tags exist.

 

For instance, I use

$var = $dom->getElementById('ctl00_mainContent_identityStrip_lblRank')->nodeValue;

The problem is, that the page I'm taking it from doesn't always have the element with that id.  I'm checking for multiple on the page, but some are there and some arent, but the script breaks if they aren't all there.  How can I check if the node exists, and then only create the variable if it does?

[salathe]

DOMDocument::getElementById returns NULL if there is no node with that ID, so check for NULL before trying to access any properties (like nodeValue).

[Arkane]

thank you Salathe.  that worked perfectly.