PHP报错：mysql_connect(): Headers and client library minor version mismatch.

背景

---

部署php项目，查看httpd的error.log时发现有如下报错：

[Fri Sep 25 09:39:36.906590 2020] [:error] [pid 12835] [client 192.168.235.20:52444] PHP Warning:  mysql_connect(): Headers and client library minor version mismatch. Headers:50564 Library:50645 in /var/www/html/v4/lib/qeephp/library/db/adapter/mysql.php on line 66, referer: https://pro4.aishu.cn/v4/public/index.php?namespace=user&controller=accountsubsidy

意思很好理解，就是数据库版本和客户端版本不匹配，我使用的是MySQL5.7.29，php-mysql安装的是5.4.16-48.el7。

解决办法

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卸载php-mysql：

[root@node-23 logs]# yum remove php-mysql -y
Loaded plugins: fastestmirror
Resolving Dependencies
--> Running transaction check
---> Package php-mysql.x86_64 0:5.4.16-48.el7 will be erased
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================================================================================================================================
 Package                                       Arch                                       Version                                            Repository                                 Size
=============================================================================================================================================================================================
Removing:
 php-mysql                                     x86_64                                     5.4.16-48.el7                                      @base                                     232 k

Transaction Summary
=============================================================================================================================================================================================
Remove  1 Package

Installed size: 232 k
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Erasing    : php-mysql-5.4.16-48.el7.x86_64                                                                                                                                            1/1 
  Verifying  : php-mysql-5.4.16-48.el7.x86_64                                                                                                                                            1/1 

Removed:
  php-mysql.x86_64 0:5.4.16-48.el7                                                                                                                                                           

Complete!

安装高版本的php-mysqlnd：

[root@node-23 logs]# yum install php-mysqlnd -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
base                                                                                                                                                                  | 2.3 kB  00:00:00     
extras                                                                                                                                                                | 1.5 kB  00:00:00     
updates                                                                                                                                                               | 1.5 kB  00:00:00     
Resolving Dependencies
--> Running transaction check
---> Package php-mysqlnd.x86_64 0:5.4.16-48.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================================================================================================================================
 Package                                         Arch                                       Version                                           Repository                                Size
=============================================================================================================================================================================================
Installing:
 php-mysqlnd                                     x86_64                                     5.4.16-48.el7                                     base                                     174 k

Transaction Summary
=============================================================================================================================================================================================
Install  1 Package

Total download size: 174 k
Installed size: 461 k
Downloading packages:
php-mysqlnd-5.4.16-48.el7.x86_64.rpm                                                                                                                                  | 174 kB  00:00:00     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : php-mysqlnd-5.4.16-48.el7.x86_64                                                                                                                                          1/1 
  Verifying  : php-mysqlnd-5.4.16-48.el7.x86_64                                                                                                                                          1/1 

Installed:
  php-mysqlnd.x86_64 0:5.4.16-48.el7                                                                                                                                                         

Complete!

重启httpd服务：

[root@node-23 logs]# systemctl restart httpd.service

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