https://yoast.com/developer-blog/php5-and-nusoap/
PHP5 and NUSOAP • Yoast
Oct 3, 2022 - PHP5 and NUSOAP combined don't work. The solution is easy: some simple renames of functions and you're done.
nusoapyoast
https://tmmwiki.com/index.php/NATS4_API_nusoap_wsdlcache
NATS4 API nusoap wsdlcache - TMM Wiki
tmm wikiapinusoap