怎么安装php7.4 的mbstring 扩展

使用下面命令：

sudo yum install php-mbstring

sudo yum install php-mbstring
Loaded plugins: extras_suggestions, langpacks, priorities, update-motd
amzn2-core                                                                                             | 3.7 kB  00:00:00     
393 packages excluded due to repository priority protections
Resolving Dependencies
--> Running transaction check
---> Package php-mbstring.x86_64 0:7.4.30-1.amzn2 will be installed
--> Processing Dependency: libonig.so.2()(64bit) for package: php-mbstring-7.4.30-1.amzn2.x86_64
--> Running transaction check
---> Package oniguruma.x86_64 0:5.9.6-1.amzn2.0.4 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

==============================================================================================================================
 Package                     Arch                  Version                             Repository                        Size
==============================================================================================================================
Installing:
 php-mbstring                x86_64                7.4.30-1.amzn2                      amzn2extra-php7.4                514 k
Installing for dependencies:
 oniguruma                   x86_64                5.9.6-1.amzn2.0.4                   amzn2-core                       127 k

Transaction Summary
==============================================================================================================================
Install  1 Package (+1 Dependent package)

Total download size: 641 k
Installed size: 2.6 M
Is this ok [y/d/N]: y
Downloading packages:
(1/2): oniguruma-5.9.6-1.amzn2.0.4.x86_64.rpm                                                          | 127 kB  00:00:00     
(2/2): php-mbstring-7.4.30-1.amzn2.x86_64.rpm                                                          | 514 kB  00:00:00     
------------------------------------------------------------------------------------------------------------------------------
Total                                                                                         4.5 MB/s | 641 kB  00:00:00     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : oniguruma-5.9.6-1.amzn2.0.4.x86_64                                                                         1/2 
  Installing : php-mbstring-7.4.30-1.amzn2.x86_64                                                                         2/2 
  Verifying  : php-mbstring-7.4.30-1.amzn2.x86_64                                                                         1/2 
  Verifying  : oniguruma-5.9.6-1.amzn2.0.4.x86_64                                                                         2/2 

Installed:
  php-mbstring.x86_64 0:7.4.30-1.amzn2                                                                                        

Dependency Installed:
  oniguruma.x86_64 0:5.9.6-1.amzn2.0.4                                                                                        

Complete!