[DomCrawler] Use the native HTM5 parser on PHP 8.4

Author: nicolas-grekas

AbstractBrowser.php

@@ -46,6 +46,7 @@ abstract class AbstractBrowser
     /** @psalm-var TResponse */
     protected object $response;
     protected Crawler $crawler;
+    /** @deprecated since Symfony 7.4, to be removed in Symfony 8 */
     protected bool $useHtml5Parser = true;
     protected bool $insulated = false;
     protected ?string $redirect;
@@ -204,10 +205,16 @@ public function getCrawler(): Crawler
     /**
      * Sets whether parsing should be done using "masterminds/html5".
      *
+     * @deprecated since Symfony 7.4, Symfony 8 will unconditionally use the native HTML5 parser
+     *
      * @return $this
      */
     public function useHtml5Parser(bool $useHtml5Parser): static
     {
+        if (\PHP_VERSION_ID >= 80400) {
+            trigger_deprecation('symfony/browser-kit', '7.4', 'Method "%s()" is deprecated. Symfony 8 will unconditionally use the native HTML5 parser.', __METHOD__);
+        }
+
         $this->useHtml5Parser = $useHtml5Parser;
 
         return $this;

CHANGELOG.md

@@ -6,6 +6,7 @@ CHANGELOG
 
  * Add `isFirstPage()` and `isLastPage()` methods to the History class for checking navigation boundaries
  * Add PHPUnit constraints: `BrowserHistoryIsOnFirstPage` and `BrowserHistoryIsOnLastPage`
+ * Deprecate `AbstractBrowser::useHtml5Parser()`; Symfony 8 will unconditionally use the native HTML5 parser
 
 6.4
 ---

composer.json

@@ -17,6 +17,7 @@
     ],
     "require": {
         "php": ">=8.2",
+        "symfony/deprecation-contracts": "^2.5|^3",
         "symfony/dom-crawler": "^6.4|^7.0|^8.0"
     },
     "require-dev": {