PHP Manual: Create an XML parser with namespace support

XMLParser xml_parser_create_ns(stringnull $encoding = null, string $separator = ":")

xml_parser_create_ns creates a new XML parser with XML namespace support and returns a XMLParser instance to be used by the other XML functions.

encoding: The input encoding is automatically detected, so that the encoding parameter specifies only the output encoding. The default output charset is UTF-8. The supported encodings are ISO-8859-1, UTF-8 and US-ASCII.
separator: With a namespace aware parser tag parameters passed to the various handler functions will consist of namespace and tag name separated by the string specified in separator.

Returns a new XMLParser instance.

Version	Description
8.0.0	This function returns an XMLParser instance now; previously, a resource was returned, or `false` on failure.
8.0.0	`encoding` is nullable now.

xml_parser_create_ns