(PHP 5 >= 5.1.2, PHP 7, PHP 8, PECL xmlwriter >= 0.1.0)
XMLWriter::startDocument -- xmlwriter_start_document — Create document tag
面向对象风格
$version = "1.0", ?string $encoding = null, ?string $standalone = null): bool过程化风格
$writer,$version = "1.0",$encoding = null,$standalone = nullStarts a document.
xmlwriter仅用于过程调用。被修改的 XMLWriter 实例对象。此资源来自于对 xmlwriter_open_uri() 或 xmlwriter_open_memory() 的调用。
versionThe version number of the document as part of the XML declaration.
encodingThe encoding of the document as part of the XML declaration.
standalone
       yes or no.