<?php 

$name = 'Elijah'; 
$yearBorn = 1975; 
$currentYear = 2005;
$age = $currentYear - $yearBorn;
?> 

public class FactExtractorVisitor implements Visitor { 

...

public boolean visit(Program node) {
	// TODO Auto-generated method stub
	this.root=node;
	return true;
	}
...
	
public boolean visit(Variable node) {
    // TODO Auto-generated method stub
    System.out.println(node.toString());
    System.out.println(this.root.getLineNumber(node.getStart()));
    return true;
}



}

PHPStructuredEditor phpStructuredEditor = // get the instance somehow
IModelElement element = phpStructuredEditor.getModelElement();
if (element instanceof ISourceModule) {
    try {
        program = SharedASTProvider.getAST((ISourceModule) element, SharedASTProvider.WAIT_ACTIVE_ONLY, null);
        ...
    } catch (ModelException | IOException e) {
    }
}

public boolean visit(Variable node) {
    // TODO Auto-generated method stub
    System.out.println(node.toString());
    Document document = new Document(node.getProgramRoot().getSourceModule().getSource());
    System.out.println(document.getLineOfOffset(node.getStart()) + 1);
    return true;
}