Que pena responder hasta ahora este mensaje, pero creo que es bueno compartir la manera de solucionar el tema.
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mkdir instalar_PHP525
cd instalar_PHP525/
wge t
http://fedora.osuosl.org/linux/relea...-7.fc9.src.rpm
rpm -Uvh
http://download.fedora.redhat.com/pu...5-3.noarch.rpm
yum install httpd-devel libc-client-devel postgresql-devel unixODBC-devel net-snmp-devel gd-devel libmcrypt-devel mhash-devel libtidy-devel freetds-devel aspell-devel apr-devel
yum install pcre-devel
yum install mysql-devel
rpm -ihv php-5.2.5-7.fc9.src.rpm
cd /usr/src/redhat/SPECS/
rpmbuild -bb php.spec
cd /usr/src/redhat/RPMS/i386/
rpm -ihv *
yum unistall
rpm -Uhv *
/etc/init.d/httpd restart
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Un saludo