(PHP 5, PHP 7, PHP 8)
DOMDocument::normalizeDocument — Normalizes the document
public DOMDocument::normalizeDocument(): void
This method acts as if you saved and then loaded the document, putting the document in a "normal" form.
This function has no parameters.
No value is returned.
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https://www.php.net/manual/en/domdocument.normalizedocument.php