a php 7.4 arch linux aur repository
sudo pacman -S base-devel git
git clone --recursive https://aur.archlinux.org/c-client
cd c-client/
makepkg -g >> PKGBUILD
makepkg -si
cd ..
git clone --recursive https://github.com/a950216t/php7-aur
cd php7-aur/
makepkg -g >> PKGBUILD
makepkg -si
pacman -U "builded package name"