CentOS 5.5 have PHP 5.2 whereas CentOS 5.6 have package PHP 5.3
Upgrade CentOS
# yum update
Upgrade PHP 5.2 to PHP 5.3
# yum list installed | grep php
Now check packages php53 available or not?
# yum search php53 | grep php
If above command return list of php53 packages .. then stop Apache
# service httpd stop
Remove old php
# yum remove php php-cli php-common php-devel php-gd php-mbstring php-curl …. and many more
Now install php53 available packages
# yum install php53 php53-cli php53-common php53-devel php53-gd php53-curl php53-json …. and many more
Then check new php version
# php -v
It will return PHP 5.3.x 🙂
