1. Go to the PHP Windows Download Page.
  2. Get the x86 Thread Safe version(s)
  3. UnZIP to a (in my case) php-7.4.23 and php-8.0.10 folder
  4. Add this lines to httpd_uwamp.conf around line 166: Define {PHPMODULENAME} {PHPMODULENAME}
<IfDefine php8_module>
LoadModule php_module "{PHPPATH}/{PHPAPACHE2FILE}"
</IfDefine>
<IfDefine php7_module>
LoadModule {PHPMODULENAME} "{PHPPATH}/{PHPAPACHE2FILE}"
</IfDefine>
<IfDefine php5_module>
LoadModule {PHPMODULENAME} "{PHPPATH}/{PHPAPACHE2FILE}"
</IfDefine>

  1. Start UwAmp.
  2. It will find the new php versions and ask if you want to install, say yes, and choose the production ini