From df0d9cf6fd448a88658685c21a919d3f78f689d3 Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Sun, 16 Oct 2016 15:33:24 +0200
Subject: [PATCH] Added DOM helper method

---
 .../install/files/lib/util/DOMUtil.class.php  | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/wcfsetup/install/files/lib/util/DOMUtil.class.php b/wcfsetup/install/files/lib/util/DOMUtil.class.php
index 21ac28d4d7..22f59845cc 100644
--- a/wcfsetup/install/files/lib/util/DOMUtil.class.php
+++ b/wcfsetup/install/files/lib/util/DOMUtil.class.php
@@ -1,5 +1,6 @@
 <?php
 namespace wcf\util;
+use wcf\system\exception\SystemException;
 
 /**
  * Provides helper methods to work with PHP's DOM implementation.
@@ -98,6 +99,27 @@ final class DOMUtil {
 		return null;
 	}
 	
+	/**
+	 * Returns a non-live collection of elements.
+	 * 
+	 * @param       (\DOMDocument|\DOMElement)      $context        context element
+	 * @param       string                          $tagName        tag name
+	 * @return      \DOMElement[]                   list of elements
+	 * @throws      SystemException
+	 */
+	public static function getElements($context, $tagName) {
+		if (!($context instanceof \DOMDocument) && !($context instanceof \DOMElement)) {
+			throw new SystemException("Expected context to be either of type \\DOMDocument or \\DOMElement.");
+		}
+		
+		$elements = [];
+		foreach ($context->getElementsByTagName($tagName) as $element) {
+			$elements[] = $element;
+		}
+		
+		return $elements;
+	}
+	
 	/**
 	 * Returns the immediate parent element before provided ancestor element. Returns null if
 	 * the ancestor element is the direct parent of provided node.
-- 
2.20.1