xml_parser_free Free an XML parser &reftitle.description; boolxml_parser_free resourceparser Frees the given XML parser. In addition to calling xml_parser_free when the parsing is finished, as of PHP 7.0.0 it is necessary to also explicitly unset the reference to parser to avoid memory leaks, if the parser resource is referenced from an object, and this object references that parser resource. &reftitle.parameters; parser A reference to the XML parser to free. &reftitle.returnvalues; This function returns &false; if parser does not refer to a valid parser, or else it frees the parser and returns &true;.