# XMLWriter::startDtd

# xmlwriter_start_dtd

(PHP 5 >= 5.1.2, PHP 7, PECL xmlwriter >= 0.1.0)

XMLWriter::startDtd -- xmlwriter_start_dtd — Create start DTD tag

### 说明

面向对象风格

XMLWriter::startDtd ( string `$qualifiedName` [, string `$publicId` [, string `$systemId` ]] ) : bool

过程化风格

xmlwriter_start_dtd ( resource `$xmlwriter` , string `$qualifiedName` [, string `$publicId` [, string `$systemId` ]] ) : bool

Starts a DTD.

### 参数

`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。

`qualifiedName`

  The qualified name of the document type to create.

`publicId`

  The external subset public identifier.

`systemId`

  The external subset system identifier.

### 返回值

成功时返回 `TRUE`， 或者在失败时返回 `FALSE`。

### 参见

- XMLWriter::endDtd() - End current DTD
- XMLWriter::writeDtd() - Write full DTD tag