<?php

$file = __DIR__ . '/test.xml';

$dom = new DOMDocument('1.0');
$dom->load($file);

$xpath = new DOMXPath($dom);

// regular xpath expression
$title = $xpath->query('/catalog/book[4]/title');
echo $title->item(0)->nodeValue . PHP_EOL;

// register a php function
$xpath->registerNamespace("php", "http://php.net/xpath");
$xpath->registerPHPFunctions(['strlen']);

// use php function in xpath expression
$title = $xpath->query('/catalog/book[php:functionString("strlen", title) = "15"]/title');
echo $title->item(0)->nodeValue . PHP_EOL;

Oberon's Legacy
Maeve Ascendant

• Using RegexIterator to filter values of collection
• The caching part of the CachingIterator
• Returning DB data rows as value objects with PDO

PHP 8.2, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8