(PHP 5)
DOMDocument::createEntityReference — Create new entity reference node
This function creates a new instance of class DOMEntityReference. 本节点不会出现在文档中，除非是用例如 DOMNode->appendChild() 函数来将其插入。
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 occured.
Raised if name contains an invalid character.