For removing php version, need to off at expose_php at php.ini.
For removing web server version,
For Apache, at httpd.conf, change to below setting.
ServerSignature Off
ServerTokens Prod
For IIS,
- Install urlscan(IIS extensoin)
- change 1 to RemoveServerHeader at UrlScan.ini
- Add "" between "" tag at each .netframe's machine.config file.