/**
* Retrieve all calls to some specified function(s).
*
* Returns all descendant nodes which represent a function call to one of the
* specified functions.
*
* @param XHPASTNode Root node.
* @param list<string> Function names.
* @return AASTNodeList
*/
protected function getFunctionCalls(XHPASTNode $root, array $function_names)
{
$calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');
$nodes = array();
foreach ($calls as $call) {
$node = $call->getChildByIndex(0);
$name = strtolower($node->getConcreteString());
if (in_array($name, $function_names)) {
$nodes[] = $call;
}
}
return AASTNodeList::newFromTreeAndNodes($root->getTree(), $nodes);
}
