(PHP 8 >= 8.4.0)
Dom\ChildNode::before — Añade nodos antes del nodo
Añade los nodes pasados antes del nodo.
nodesNodos a añadir antes del nodo. Las cadenas de caracteres son automáticamente convertidas en nodos de texto.
No devuelve ningún valor.
DOM_HIERARCHY_REQUEST_ERR
Raised if the parent is of a type that does not allow children of the
type of one of the passed nodes, or if the node to
put in is one of this node's ancestors or this node itself.
DOM_WRONG_DOCUMENT_ERR
Raised if one of the passed nodes was created from a different
document than the one that created this node.