Enterprise Linux 5 - RHEL 5 (Tikanga) - CentOS 5
EL-5 has reach "End Of Life"
You should consider upgrading to a supported release.
This repository is no more maintained. RPM still available for history.
Time to plan an upgrade.
remi (includes PHP 5.4, extensions and Software Collections)
Warning: some noarch packages may requires php 5.5 or greater (e.g. phpMyAdmin > 4.5)
so you may have to enable remi-php55 or remi-php56 to use these (but PHP 5.4 is EOL, so upgrade is recommended).