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ここでは、PHP5.3のインストール手順を掲載しています。

PHP5.1から5.3へ

CentOS 5のPHPは通常5.1.6というバージョンがインストールされます。

この5.1.6というバージョンは非常に古く(2006年)、最近のWordPressやphpMyAdminなどのWebアプリケーションに対応していません。

CentOS 6の登場で、このPHPも5.3.3にアップデートされました。CentOS 5では、従来のバージョンとは分けて管理され、php53というパッケージになっています。

PHPのアンインストール

すでに5.1.6がインストールされている場合は、先にPHPを削除します。

[root@co ~]# yum -y remove php php-*

Loaded plugins: downloadonly, fastestmirror, security
Setting up Remove Process
Resolving Dependencies
--> Running transaction check
---> Package php.x86_64 0:5.1.6-39.el5_8 set to be erased
---> Package php-cli.x86_64 0:5.1.6-39.el5_8 set to be erased
---> Package php-common.x86_64 0:5.1.6-39.el5_8 set to be erased
---> Package php-mbstring.x86_64 0:5.1.6-39.el5_8 set to be erased
---> Package php-mysql.x86_64 0:5.1.6-39.el5_8 set to be erased
---> Package php-pdo.x86_64 0:5.1.6-39.el5_8 set to be erased
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
Package             Arch          Version               Repository        Size
================================================================================
Removing:
php                 x86_64        5.1.6-39.el5_8        installed        6.3 M
php-cli             x86_64        5.1.6-39.el5_8        installed        5.3 M
php-common          x86_64        5.1.6-39.el5_8        installed        397 k
php-mbstring        x86_64        5.1.6-39.el5_8        installed        1.8 M
php-mysql           x86_64        5.1.6-39.el5_8        installed        196 k
php-pdo             x86_64        5.1.6-39.el5_8        installed        114 k

Transaction Summary
================================================================================
Remove        6 Package(s)
Reinstall     0 Package(s)
Downgrade     0 Package(s)

Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Erasing        : php-mysql                                                1/6
  Erasing        : php-pdo                                                  2/6
  Erasing        : php-cli                                                  3/6
  Erasing        : php-mbstring                                             4/6
  Erasing        : php                                                      5/6
  Erasing        : php-common                                               6/6

Removed:
  php.x86_64 0:5.1.6-39.el5_8           php-cli.x86_64 0:5.1.6-39.el5_8
  php-common.x86_64 0:5.1.6-39.el5_8    php-mbstring.x86_64 0:5.1.6-39.el5_8
  php-mysql.x86_64 0:5.1.6-39.el5_8     php-pdo.x86_64 0:5.1.6-39.el5_8

Complete!

PHP5.3のインストール

続いて、PHP5.3をインストールします。

[root@co ~]# yum -y install php53 php53-mbstring php53-mysql

Loaded plugins: downloadonly, fastestmirror, security
Loading mirror speeds from cached hostfile
* base: www.ftp.ne.jp
* extras: www.ftp.ne.jp
* updates: centosi3.centos.org
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package php53.x86_64 0:5.3.3-13.el5_8 set to be updated
--> Processing Dependency: php53-cli = 5.3.3-13.el5_8 for package: php53
--> Processing Dependency: php53-common = 5.3.3-13.el5_8 for package: php53
---> Package php53-mbstring.x86_64 0:5.3.3-13.el5_8 set to be updated
---> Package php53-mysql.x86_64 0:5.3.3-13.el5_8 set to be updated
--> Processing Dependency: php53-pdo for package: php53-mysql
--> Running transaction check
---> Package php53-cli.x86_64 0:5.3.3-13.el5_8 set to be updated
---> Package php53-common.x86_64 0:5.3.3-13.el5_8 set to be updated
---> Package php53-pdo.x86_64 0:5.3.3-13.el5_8 set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
Package               Arch          Version                  Repository   Size
================================================================================
Installing:
php53                 x86_64        5.3.3-13.el5_8           base        1.3 M
php53-mbstring        x86_64        5.3.3-13.el5_8           base        1.2 M
php53-mysql           x86_64        5.3.3-13.el5_8           base         93 k
Installing for dependencies:
php53-cli             x86_64        5.3.3-13.el5_8           base        2.4 M
php53-common          x86_64        5.3.3-13.el5_8           base        606 k
php53-pdo             x86_64        5.3.3-13.el5_8           base         68 k

Transaction Summary
================================================================================
Install 6 Package(s)
Upgrade 0 Package(s)

Total download size: 5.6 M
Downloading Packages:
(1/6): php53-pdo-5.3.3-13.el5_8.x86_64.rpm               |  68 kB     00:00
(2/6): php53-mysql-5.3.3-13.el5_8.x86_64.rpm             | 93 kB     00:00
(3/6): php53-common-5.3.3-13.el5_8.x86_64.rpm            | 606 kB     00:00
(4/6): php53-mbstring-5.3.3-13.el5_8.x86_64.rpm          | 1.2 MB     00:00
(5/6): php53-5.3.3-13.el5_8.x86_64.rpm                   | 1.3 MB     00:00
(6/6): php53-cli-5.3.3-13.el5_8.x86_64.rpm               | 2.4 MB     00:00
--------------------------------------------------------------------------------
Total                                           3.9 MB/s | 5.6 MB     00:01
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing     : php53-common                                             1/6
  Installing     : php53-cli                                                2/6
  Installing     : php53-pdo                                                3/6
  Installing     : php53-mbstring                                           4/6
  Installing     : php53-mysql                                              5/6
  Installing     : php53                                                    6/6

Installed:
php53.x86_64 0:5.3.3-13.el5_8 php53-mbstring.x86_64 0:5.3.3-13.el5_8
php53-mysql.x86_64 0:5.3.3-13.el5_8

Dependency Installed:
php53-cli.x86_64 0:5.3.3-13.el5_8 php53-common.x86_64 0:5.3.3-13.el5_8
php53-pdo.x86_64 0:5.3.3-13.el5_8

Complete!

バージョンを確認してみましょう。5.3.3になっていればOKです。

[root@co ~]# php -v

PHP 5.3.3 (cli) (built: Jun 27 2012 12:25:48)
Copyright (c) 1997-2010 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies

PHPの設定

続いて、設定を行います。基本的に5.1.6と変わりません。

先に5.1.6がインストールされていた場合、設定ファイルを引き継げるっぽいので、確認程度で大丈夫でしょう。

[root@co ~]# vi /etc/php.ini

expose_php = On
    ↓
expose_php = Off

;error_log = filename
    ↓
error_log = /var/log/httpd/php-error.log

;default_charset = "iso-8859-1"
    ↓
default_charset = "UTF-8"

[mbstring]
;mbstring.language = Japanese
;mbstring.internal_encoding = EUC-JP
;mbstring.http_input = auto
;mbstring.http_output = SJIS
;mbstring.encoding_translation = Off
;mbstring.detect_order = auto
;mbstring.substitute_character = none;
    ↓
mbstring.language = Japanese
mbstring.internal_encoding = UTF-8
mbstring.http_input = auto
mbstring.http_output = pass
mbstring.encoding_translation = On
mbstring.detect_order = auto
mbstring.substitute_character = none;