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<?php $xml = '<?xml version="1.0" encoding="utf-8" standalone="no"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"><html><head></head><body></body></html>'; $dom = new DOMDocument(); $dom->loadHTML($xml); echo $dom->saveXML();
Output for git.master, git.master_jit, rfc.property-hooks
<?xml version="1.0" standalone="yes"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <?xml version="1.0" encoding="utf-8" standalone="no"??> <html><head/><body/></html>

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