(No version information available, might be only in CVS)
DomDocument->create_processing_instruction — Creates new PI node
This function returns a new instance of class DomCData. The content of the pi is the value of the passed parameter. 本节点不会出现在文档中，除非是用例如 domnode_append_child() 函数来将其插入。
The return value is FALSE if an error occurred.
See also domnode_append_child(), domdocument_create_element(), domdocument_create_text(), domdocument_create_cdata_section(), domdocument_create_attribute(), domdocument_create_entity_reference(), and domnode_insert_before().