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   // Start the document $writer->startDocument('1.0', 'UTF-8');   // Start a element $writer->startElement('div');   // Add value to the element $writer->text('neveropen');   // End the element $writer->endElement();   // End the document $writer->endDocument(); ?> |
Output:
<?xml version="1.0" encoding="UTF-8"?> <div>neveropen</div>
Example 2:
<?php   // Create a new XMLWriter instance $writer = new XMLWriter();     // Create the output stream as PHP     // 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('neveropen');     // End the element $writer->endElement();     // End the document $writer->endDocument(); ?> |
Output:
Reference: https://www.php.net/manual/en/function.xmlwriter-start-document.php
