wp_is_xml_request(): bool

1980function wp_is_xml_request() {1981	$accepted = array(1982		'text/xml',1983		'application/rss+xml',1984		'application/atom+xml',1985		'application/rdf+xml',1986		'text/xml+oembed',1987		'application/xml+oembed',1988	);1989 1990	if ( isset( $_SERVER['HTTP_ACCEPT'] ) ) {1991		foreach ( $accepted as $type ) {1992			if ( str_contains( $_SERVER['HTTP_ACCEPT'], $type ) ) {1993				return true;1994			}1995		}1996	}1997 1998	if ( isset( $_SERVER['CONTENT_TYPE'] ) && in_array( $_SERVER['CONTENT_TYPE'], $accepted, true ) ) {1999		return true;2000	}2001 2002	return false;2003}