如何解决php5.4 系统升级出错问题

php5.4系统升级出错的解决办法：1、安装libmcrypt，libmcrypt-devel；2、升级EPEL源；3、重新升级即可。

本文操作环境：CentOS7.3系统、php5.4版、Dell G3电脑。

如何解决php5.4 系统升级出错问题？

CentOS7 PHP5.4 升级 PHP5.6 缺少libmcrypt问题解决办法

系统为CentOS7.3，安装PHP后，版本为5.4，当进行升级5.6时发生错误：报错缺少libmcrypt.so.4()(64bit)库

需要安装libmcrypt，libmcrypt-devel：

yum install libmcrypt libmcrypt-devel

直接输入以上指令，出错！问题为EPEL源未更新到最新版本。

需要升级EPEL源：

命令：yum -y install epel-release

yum -y install epel-release
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: 100.125.0.40
 * extras: 100.125.0.40
 * updates: 100.125.0.40
 * webtatic: us-east.repo.webtatic.com
Resolving Dependencies
--> Running transaction check
---> Package epel-release.noarch 0:7-9 will be updated
---> Package epel-release.noarch 0:7-11 will be an update
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================
 Package                      Arch                   Version               Repository              Size
========================================================================================================
Updating:
 epel-release                 noarch                 7-11                  extras                  15 k

Transaction Summary
========================================================================================================
Upgrade  1 Package

Total download size: 15 k
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
epel-release-7-11.noarch.rpm                                                     |  15 kB  00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Updating   : epel-release-7-11.noarch                                                             1/2
  Cleanup    : epel-release-7-9.noarch                                                              2/2
  Verifying  : epel-release-7-11.noarch                                                             1/2
  Verifying  : epel-release-7-9.noarch                                                              2/2

Updated:
  epel-release.noarch 0:7-11

Complete!

从7-9 升级至7-11

EPEL最新是7-12，因此再输入一次上面的指令：

 yum -y install epel-release
Loaded plugins: fastestmirror, langpacks
epel/x86_64/metalink                                                             | 8.6 kB  00:00:00
epel                                                                             | 5.4 kB  00:00:00
(1/3): epel/x86_64/updateinfo                                                    | 1.0 MB  00:00:00
(2/3): epel/x86_64/group_gz                                                      |  90 kB  00:00:01
(3/3): epel/x86_64/primary_db                                                    | 6.9 MB  00:01:00
Loading mirror speeds from cached hostfile
 * base: 100.125.0.40
 * epel: mirrors.aliyun.com
 * extras: 100.125.0.40
 * updates: 100.125.0.40
 * webtatic: uk.repo.webtatic.com
Resolving Dependencies
--> Running transaction check
---> Package epel-release.noarch 0:7-11 will be updated
---> Package epel-release.noarch 0:7-12 will be an update
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================
 Package                      Arch                   Version                 Repository            Size
========================================================================================================
Updating:
 epel-release                 noarch                 7-12                    epel                  15 k

Transaction Summary
========================================================================================================
Upgrade  1 Package

Total download size: 15 k
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
epel-release-7-12.noarch.rpm                                                     |  15 kB  00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Updating   : epel-release-7-12.noarch                                                             1/2
  Cleanup    : epel-release-7-11.noarch                                                             2/2
  Verifying  : epel-release-7-12.noarch                                                             1/2
  Verifying  : epel-release-7-11.noarch                                                             2/2

Updated:
  epel-release.noarch 0:7-12

完成升级7-12。

再次安装

libmcrypt，libmcrypt-devel：

yum install libmcrypt libmcrypt-devel

yum install libmcrypt libmcrypt-devel
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: 100.125.0.40
 * epel: my.mirrors.thegigabit.com
 * extras: 100.125.0.40
 * updates: 100.125.0.40
 * webtatic: uk.repo.webtatic.com
Resolving Dependencies
--> Running transaction check
---> Package libmcrypt.x86_64 0:2.5.8-13.el7 will be installed
---> Package libmcrypt-devel.x86_64 0:2.5.8-13.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================
 Package                       Arch                 Version                    Repository          Size
========================================================================================================
Installing:
 libmcrypt                     x86_64               2.5.8-13.el7               epel                99 k
 libmcrypt-devel               x86_64               2.5.8-13.el7               epel                13 k

Transaction Summary
========================================================================================================
Install  2 Packages

Total download size: 112 k
Installed size: 302 k
Is this ok [y/d/N]: y
Downloading packages:
(1/2): libmcrypt-2.5.8-13.el7.x86_64.rpm                                         |  99 kB  00:00:00
(2/2): libmcrypt-devel-2.5.8-13.el7.x86_64.rpm                                   |  13 kB  00:00:00
--------------------------------------------------------------------------------------------------------
Total                                                                   1.2 MB/s | 112 kB  00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : libmcrypt-2.5.8-13.el7.x86_64                                                        1/2
  Installing : libmcrypt-devel-2.5.8-13.el7.x86_64                                                  2/2
  Verifying  : libmcrypt-devel-2.5.8-13.el7.x86_64                                                  1/2
  Verifying  : libmcrypt-2.5.8-13.el7.x86_64                                                        2/2

Installed:
  libmcrypt.x86_64 0:2.5.8-13.el7                 libmcrypt-devel.x86_64 0:2.5.8-13.el7

Complete!

成功！

最后升级PHP，指令：

yum install -y php56w php56w-opcache php56w-xml php56w-mcrypt php56w-gd php56w-devel php56w-mysql php56w-intl php56w-mbstring

推荐学习：《PHP视频教程》

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