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Executes the function, specified in the text content, with $GLOBALS["HTMLPARSER"]->q(xpath) as $el argument of the function;

Context: //app/filters/dom/filter/nodelist

- filter node first processing instruction holds the function code; this does not have to return anything since the operations are made on the DOM Element;
- nodelist node text content holds the xpath;
- $GLOBALS["HTMLPARSER"] is an instance of awsXML class; For further details see class documentation;
See also:

DOMNode class || DOMElement class || awsXML class
Setting up the filter code
Setting up the xpath