xml_set_start_namespace_decl_handler Set up start namespace declaration handler &reftitle.description; boolxml_set_start_namespace_decl_handler resourceparser callbackhandler Set a handler to be called when a namespace is declared. Namespace declarations occur inside start tags. But the namespace declaration start handler is called before the start tag handler for each namespace declared in that start tag. &reftitle.parameters; parser A reference to the XML parser. handler handler is a string containing the name of a function that must exist when xml_parse is called for parser. The function named by handler must accept four parameters, and should return an integer value. If the value returned from the handler is &false; (which it will be if no value is returned), the XML parser will stop parsing and xml_get_error_code will return XML_ERROR_EXTERNAL_ENTITY_HANDLING. handler resourceparser stringuser_data stringprefix stringuri parser The first parameter, parser, is a reference to the XML parser calling the handler. user_data prefix uri If a handler function is set to an empty string, or &false;, the handler in question is disabled. ¬e.func-callback; &reftitle.returnvalues; &return.success; &reftitle.seealso; xml_set_end_namespace_decl_handler