几天来，我一直在尝试安装 php-redis 扩展。
尝试使用 brew 并得到这个......
$ brew install php71-redis
Error: No available formula with the name "php71-redis"
==> Searching for a previously deleted formula (in the last month)...
Warning: homebrew/core is shallow clone. To get complete history run:
git -C "$(brew --repo homebrew/core)" fetch --unshallow
Error: No previously deleted formula found.
==> Searching for similarly named formulae...
Error: No similarly named formulae found.
==> Searching taps...
==> Searching taps on GitHub...
Error: No formulae found in taps.
尝试使用 PECL …