What is the significance of the warning message "htmlParseStartTag: misplaced <body> tag" in the context of using DOMDocument in PHP?

The warning message "htmlParseStartTag: misplaced <body> tag" indicates that there is an issue with the structure of the HTML document being parsed using DOMDocument in PHP. This warning typically occurs when the <body> tag is placed incorrectly within the HTML document. To solve this issue, ensure that the <body> tag is placed within the <html> tag and after the <head> tag in the HTML document.

$doc = new DOMDocument();
$doc-&gt;loadHTML(&#039;&lt;html&gt;&lt;head&gt;&lt;title&gt;Test&lt;/title&gt;&lt;/head&gt;&lt;body&gt;&lt;h1&gt;Hello World!&lt;/h1&gt;&lt;/body&gt;&lt;/html&gt;&#039;);
echo $doc-&gt;saveHTML();