/**
* Replace child with another node
* @param string|epQueryNode &$key_or_node
* @param epQueryNode &$node
* @return boolean
*/
public function replaceChild(&$key_or_node, epQueryNode &$node)
{
// a key (string)
if (is_string($key_or_node)) {
if (!isset($this->children[$key_or_node])) {
return false;
}
// remove parent from child
$this->children[$key_or_node]->setParent(false);
// replace child with new node
$this->children[$key_or_node] =& $node;
// set parent to child node
$node->setParent($this);
return true;
} else {
if ($key_or_node instanceof epQueryNode) {
// need to go through all children
foreach ($this->children as $key => &$child) {
// same as this child (notice ===)
if ($child === $key_or_node) {
// remove parent from child
$this->children[$key]->setParent(false);
// replace child with new node
$this->children[$key] =& $node;
// set parent to child node
$node->setParent($this);
return true;
}
}
}
}
return false;
}
