Creates an XML document from the dom representation. This function
usually is called after building a new dom document from scratch
as in the example below. The
format specifies whether the output should be
neatly formatted, or not. The first parameter specifies the name of the
filename and the second parameter, whether it should be compressed or not.
Sometimes it maybe strange in the structure of the XML document when using false, true as the two boolean parameters. Using false, false can solve the problem.