(PHP 5 >= 5.1.2, PHP 7, PECL xmlwriter >= 0.1.0)
XMLWriter::startDtd -- xmlwriter_start_dtd — Create start DTD tag
面向对象风格
$qualifiedName
[, string $publicId
[, string $systemId
]] ) : bool过程化风格
$xmlwriter
, string $qualifiedName
[, string $publicId
[, string $systemId
]] ) : boolStarts a DTD.
xmlwriter仅用于过程调用。被修改的 XMLWriter resource。此资源来自于对 xmlwriter_open_uri() 或 xmlwriter_open_memory() 的调用。
qualifiedNameThe qualified name of the document type to create.
publicIdThe external subset public identifier.
systemIdThe external subset system identifier.
成功时返回 TRUE， 或者在失败时返回 FALSE。
If you will write a HTML document :
// $xml = new XMLWriter(); you know it and openURI()
<?php
// for HTML 5
$xml->startDTD('html');
// for XHTML 1.0
$xml->startDTD('html', '-//W3C//DTD XHTML 1.0 Strict//EN','http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'); // standards compliant
$xml->endDTD();
?>
it will be :
<!DOCTYPE html>
or <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN">
don't need to startDocument() .