PHP: Select HTML elements with more than one css class using XPath

Recently, while working on my project FeedAPI ImageGrabber I came across the issue where I had to select HTML elements by a given css class. The HTML element can have a single CSS class: [cc lang=“php”]

[/cc] or multiple CSS classes associated with it. [cc lang=“php”]

[/cc] Now if you want to select the HTML elements with class “foo”, this div element would be one of them.

As, I do not have much experience with XPath, I started to search for a solution. After a lot of search and discussion on Drupal development mailing lists, I arrived at the following XPath : [cc lang=“php” width=“600”] //*[@class and contains(concat(’ ‘,normalize-space(@class),’ ‘),’ $classname ‘)] [/cc] The normalize-space function replaces all continuous tabs and whitespaces with a single whitespace character. Then, we concatenate the resulting string with two white-spaces, one in the start and other at the last. At last, we search for [cc lang=“php”]’ ’ . $classname . ’ ’ [/cc] in the final string.

I hope it helps.