Keep in mind that this method can't handle schemas in compact syntax!
(PHP 5, PHP 7, PHP 8)
DOMDocument::relaxNGValidate — Performs relaxNG validation on the document
Performs » relaxNG validation on the document based on the given RNG schema.
filename
The RNG file.
Returns true
on success or false
on failure.
Keep in mind that this method can't handle schemas in compact syntax!