PHP | XMLWriter startDocument() Function

The XMLWriter::startDocument() function is an inbuilt function in PHP which is used to start the document. This document then needs to be ended with XMLWriter::endDocument function.

Syntax:

bool XMLWriter::startDocument( string $version, 
string $encoding, string $standalone )

Parameters: This function accepts three parameters as mentioned above and described below:

• $version (Optional): It specifies the version number of the document as part of the XML declaration.
• $encoding (Optional): It specifies the encoding of the document as part of the XML declaration.
• $standalone (Optional): It specifies whether document is standalone or not.

Return Value: This function returns TRUE on success or FALSE on failure.

Below examples illustrate the XMLWriter::startDocument() function in PHP:

Example 1:

<?php

// Create a new XMLWriter instance
$writer = new XMLWriter();

// Create the output stream as PHP
$writer->openURI('php://output');

// Start the document
$writer->startDocument('1.0', 'UTF-8');

// Start a element
$writer->startElement('div');

// Add value to the element
$writer->text('GeeksforGeeks');

// End the element
$writer->endElement();

// End the document
$writer->endDocument();
?>

Output:

<?xml version="1.0" encoding="UTF-8"?>
<div>GeeksforGeeks</div>

Example 2:

<?php

// Create a new XMLWriter instance
$writer = new XMLWriter();

// Create the output stream as PHP
$writer->openURI('php://output');

// Start the document
$writer->startDocument('1.0', 'UTF-8');

// Start a h1 element
$writer->startElement('h1');

// Start the style attribute
$writer->startAttribute('style');

// Add value to the attribute
$writer->text('color:orange;font-size:80px;');

// End the attribute
$writer->endAttribute();

// Add value to the element
$writer->text('GeeksforGeeks');

// End the element
$writer->endElement();

// End the document
$writer->endDocument();
?>

Output: