(PHP 5 >= 5.1.2, PHP 7, PECL xmlwriter >= 1.0.0)
XMLWriter::flush -- xmlwriter_flush — Flush current buffer
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Flushes the current buffer.
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empty
Whether to empty the buffer or not. Default is TRUE.
If you opened the writer in memory, this function returns the generated XML buffer, Else, if using URI, this function will write the buffer and return the number of written bytes.