Tips for reading and writing XML files with PHP_PHP tutorial

Commonly used lines are as follows:

header("content-type:text/html; charset=utf-8"); //Specify PHP to use UTF-8 encoding
$xml = simplexml_load_file("example.xml"); //Read xml file
$newxml = $xml->asXML(); //Standardize $xml
$fp = fopen("newxml.xml", "w"); //New xml file
fwrite($fp, $newxml); //Write -------xml file
fclose($fp);

PHP can easily generate and read XML files. PHP mainly completes XML reading and writing operations through DOMDocument, DOMElement and DOMNodeList. Below is a brief explanation of how to use these classes.

1. Generate XML file
For an XML file as follows.

[html]

First create a new DOMDocument object and set the encoding format.

$dom = newDOMDocument('1.0', 'UTF-8');

$dom->formatOutput= true;

Create the