How to install php5.6 on CentOS:
1. Configure yum source
2. Add the epel and remi sources of CentOS 6.5.
# rpm -Uvh http://ftp.iij.ad.jp/pub/linux/fedora/epel/6/x86_64/epel-release-6-8.noarch.rpm# rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
The following is the source for CentOS 7.0.
# yum install epel-release# rpm -ivh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm
3. Use the yum list command to view the installable packages (Packege).
# yum list --enablerepo=remi --enablerepo=remi-php56 | grep php
4. Install PHP5.6
5. After the yum source is configured, the next step is to install PHP5.6.
# yum install --enablerepo=remi --enablerepo=remi-php56 php php-opcache php-devel php-mbstring php-mcrypt php-mysqlnd php-phpunit-PHPUnit php-pecl-xdebug php-pecl-xhprof
6. Use PHP command to check the version.
# php --versionPHP 5.6.0 (cli) (built: Sep 3 2014 19:51:31)Copyright (c) 1997-2014 The PHP GroupZend Engine v2.6.0, Copyright (c) 1998-2014 Zend Technologies with Zend OPcache v7.0.4-dev, Copyright (c) 1999-2014, by Zend Technologies with Xdebug v2.2.5, Copyright (c) 2002-2014, by Derick Rethans
The version installed here is PHP5.6.0. Careful users may have discovered that ZendGuardLoader has become Zend OPcahe.
Starting from PHP5.5, the PHP code cache has changed from APC to Zend OPcache.
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