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> yum update php
After a reboot, the PHP version is still the same.
I am not sure how the yum works and where yum gets its software updates from.
Must I update YUM first?
How can I update yum?
Is there other ways to update software like RPM? I am not sure about RPM as well.
I would like to understand YUM more so that I can update other software. The OS is CentOS 4.
#1 Remove PHP 4 and manually install php 5 (which may or may not work). You need to download php5 rpm from centos mirror
#2 Upgrade to CentOS 5 which comes with Apache 2.2 and PHP 5.1.