php icu 库是什么意思,php动态库libicui18n报错

安装完成ffmpeg出现动态库libicui18n报错，不存在

$ php -v

dyld: Library not loaded: /usr/local/opt/icu4c/lib/libicui18n.63.dylib

Referenced from: /usr/local/opt/php@7.2/bin/php

Reason: image not found

[1] 31174 abort php -v

通过网上查找资料了解到php新版本的动态库7.2.16不能使用63版本，通过升级php可以解决问题。

使用brew升级php

$ brew upgrade php72

==> Upgrading 1 outdated package:

php@7.2 7.2.16 -> 7.2.20

==> Upgrading php@7.2

==> Installing dependencies for php@7.2: apr, argon2, libssh2, jemalloc, libev, nghttp2, curl-openssl, freetds, libpq and libsodium

==> Installing php@7.2 dependency: apr

==> Downloading https://homebrew.bintray.com/bottles/apr-1.7.0.mojave.bottle.tar.gz

==> Downloading from https://akamai.bintray.com/3a/3a245185ed7280d1a19e7c639786b4c21dd0088878be8ac87ca58510eb5c9cc1?__gda__=exp=1563530722~hmac=8e94698ea6aa458b7dfea49d1cde602217ab9a2

######################################################################## 100.0%

==> Pouring apr-1.7.0.mojave.bottle.tar.gz

==> Caveats

apr is keg-only, which means it was not symlinked into /usr/local,

because Apple's CLT package contains apr.

If you need to have apr first in your PATH run:

echo 'export PATH="/usr/local/opt/apr/bin:$PATH"' >> ~/.zshrc

一切结束之后执行php查看版本：

$ php -v

PHP 7.2.20 (cli) (built: Jul 5 2019 12:51:26) ( NTS )

Copyright (c) 1997-2018 The PHP Group

Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies

with Zend OPcache v7.2.20, Copyright (c) 1999-2018, by Zend Technologies

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