PHP not have a function for XML-safe entity decode? Not have some xml_entity_decode?

Question

THE PROBLEM: I need a XML file \"full encoded\" by UTF8; that is, with no entity representing symbols, all symbols enconded by UTF8, except the only 3 ones that are

Answer 1

Use the DTD when loading the JATS XML document, as it will define any mapping from named entities to Unicode characters, then set the encoding to UTF-8 when saving:

$doc = new DOMDocument;
$doc->load($inputFile, LIBXML_DTDLOAD | LIBXML_NOENT);
$doc->encoding = 'UTF-8';
$doc->save($outputFile);