(PHP 5, PHP 7, PHP 8)
DOMDocument::createEntityReference — Create new entity reference node
This function creates a new instance of class DOMEntityReference. This node will not show up in the document unless it is inserted with (e.g.) DOMNode::appendChild().
name
       The content of the entity reference, e.g. the entity reference minus
       the leading & and the trailing
       ; characters.
      
   The new DOMEntityReference or false if an error
   occurred.
  
DOM_INVALID_CHARACTER_ERR
       Raised if name contains an invalid character.