(PHP 4, PHP 5, PHP 7)
xml_parser_free — Free an XML parser
$parser
   ) : bool
   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.
   
parser
   This function returns FALSE if parser does not
   refer to a valid parser, or else it frees the parser and returns TRUE.