diff --git a/src/Symfony/Component/DomCrawler/Crawler.php b/src/Symfony/Component/DomCrawler/Crawler.php
index 4efbbf9b2d880..70a4b607dcdca 100644
--- a/src/Symfony/Component/DomCrawler/Crawler.php
+++ b/src/Symfony/Component/DomCrawler/Crawler.php
@@ -69,6 +69,7 @@ public function __construct($node = null, string $uri = null, string $baseHref =
{
$this->uri = $uri;
$this->baseHref = $baseHref ?: $uri;
+ $this->html5Parser = class_exists(HTML5::class) ? new HTML5(['disable_html_ns' => true]) : null;
$this->add($node);
}
@@ -190,13 +191,7 @@ public function addContent($content, $type = null)
public function addHtmlContent($content, $charset = 'UTF-8')
{
// Use HTML5 parser if the content is HTML5 and the library is available
- if (!$this->html5Parser
- && class_exists(HTML5::class)
- && '' === strtolower(substr(ltrim($content), 0, 15))) {
- $this->html5Parser = new HTML5(['disable_html_ns' => true]);
- }
-
- $dom = null !== $this->html5Parser ? $this->parseHtml5($content, $charset) : $this->parseXhtml($content, $charset);
+ $dom = null !== $this->html5Parser && strspn($content, " \t\r\n") === stripos($content, '') ? $this->parseHtml5($content, $charset) : $this->parseXhtml($content, $charset);
$this->addDocument($dom);
$base = $this->filterRelativeXPath('descendant-or-self::base')->extract(['href']);
@@ -599,18 +594,16 @@ public function html(/* $default = null */)
throw new \InvalidArgumentException('The current node list is empty.');
}
- if (null !== $this->html5Parser) {
- $html = '';
- foreach ($this->getNode(0)->childNodes as $child) {
- $html .= $this->html5Parser->saveHTML($child);
- }
+ $node = $this->getNode(0);
+ $owner = $node->ownerDocument;
- return $html;
+ if (null !== $this->html5Parser && '' === $owner->saveXML($owner->childNodes[0])) {
+ $owner = $this->html5Parser;
}
$html = '';
- foreach ($this->getNode(0)->childNodes as $child) {
- $html .= $child->ownerDocument->saveHTML($child);
+ foreach ($node->childNodes as $child) {
+ $html .= $owner->saveHTML($child);
}
return $html;
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