downgrade php 5.3.to 5.2 on CentOS 6

The Atomic repo is unavailable.

yum -y install bzip2-devel curl-devel   db4-devel gmp-devel httpd-devel pam-devel libstdc++-devel pcre-devel  readline-devel  libtool gcc-c++  libc-client-devel cyrus-sasl-devel openldap-devel  postgresql-devel unixODBC-devel libxml2-devel net-snmp-devel libxslt-devel libxml2-devel expat-devel ncurses-devel libjpeg-devel libpng-devel freetype-devel libmcrypt-devel  mhash-devel libtidy-devel  freetds-devel aspell-devel

wget http://museum.php.net/php5/php-5.2.17.tar.bz2

and ./configure

make 

make install