Adding PHP8

Author: smokodon

.travis.yml

@@ -428,7 +428,7 @@ script:
   - cat $HOME/.php-build/share/php-build/default_configure_options
   - export PKG_CONFIG_PATH="$HOME/.phpenv/versions/$VERSION/lib/pkgconfig:$PKG_CONFIG_PATH"
   - sudo ./bin/compile
-  - sudo mkdir -p /usr/local/bin/composer && sudo wget -P /usr/local/bin/composer http://getcomposer.org/composer.phar && sudo chmod +x /usr/local/bin/composer/composer.phar && composer self-update
+  - sudo mkdir -p /usr/local/bin/composer && sudo wget -P /usr/local/bin/composer http://getcomposer.org/composer.phar && sudo chmod +x /usr/local/bin/composer/composer.phar && alias composer='/usr/local/bin/composer/composer.phar' && composer self-update
   - | # disable 3rd-party extension builds on master
     if [[ $VERSION =~ ^7.3.* ]]; then
       (yes '' | sudo ./bin/compile-extension-redis) &&