(PHP 5, PHP 7)
Searches for an element with a certain id
public DOMElement DOMDocument::getElementById ( string $elementId )
This function is similar to DOMDocument::getElementsByTagName but searches for an element with a given id.
For this function to work, you will need either to set some ID attributes with DOMElement::setIdAttribute or a DTD which defines an attribute to be of type ID. In the later case, you will need t