XMLWriter::startDocument

xmlwriter_start_document

(PHP 5 >= 5.1.2, PHP 7, PHP 8, PECL xmlwriter >= 0.1.0)

XMLWriter::startDocument -- xmlwriter_start_document — Create document tag

Description

Object-oriented style

public XMLWriter::startDocument(?string $version = "1.0", ?string $encoding = null, ?string $standalone = null): bool

Procedural style

xmlwriter_start_document(
    XMLWriter $writer,
    ?string $version = "1.0",
    ?string $encoding = null,
    ?string $standalone = null
): bool

Starts a document.

Parameters

writer: Only for procedural calls. The XMLWriter instance that is being modified. This object is returned from a call to xmlwriter_open_uri() or xmlwriter_open_memory().
version: The version number of the document as part of the XML declaration.
encoding: The encoding of the document as part of the XML declaration.
standalone: yes or no.

Return Values

Returns true on success or false on failure.

Errors/Exceptions

Passing an encoding containing null bytes will throw a ValueError.

Changelog

Version	Description
8.4.0	Passing an `encoding` containing null bytes will now throw a ValueError.
8.0.0	`writer` expects an XMLWriter instance now; previously, a resource was expected.

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User Contributed Notes 1 note

down

Sbastien ¶

2 years ago

XMLWriter::startDocument() writes the XML declaration.

Without XMLWriter::startDocument() :

<?php

$xml = new XMLWriter();
$xml->openUri('php://stdout');
$xml->writeElement('message', 'Hello World!');
exit;

/*
Outputs :
<message>Hello World!</message>
*/
?>

With XMLWriter::startDocument() :

<?php

$xml = new XMLWriter();
$xml->openUri('php://stdout');
$xml->startDocument();
$xml->writeElement('message', 'Hello World!');
exit;

/*
Outputs :
<?xml version="1.0"?>
<message>Hello World!</message>
*/
?>