wget http://jp.php.net/get/php-5.3.6.tar.gz/from/jp.php.net/mirror
tar zxvf php-5.3.6.tar.gz
cd php-5.3.6
yum install -y libxml2
yum install -y libxml2-devel
yum install -y libpng-devel
//libmcryptは失敗したのでhttp://qiita.com/items/cc84da42419f1ab3443bを試してインストール。
yum install -y libmcrypt
//libmcrypt-develは失敗したのでhttp://qiita.com/items/cc84da42419f1ab3443bを試してインストール。
yum install -y libmcrypt-devel
yum install -y httpd-devel
yum install -y libtool-ltdl
yum install -y libtool-ltdl-devel
yum install -y gcc
./configure --enable-mbstring --enable-mbregex --enable-zend-multibyte --with-zlib-dir=/usr/lib --with-apxs2=/usr/sbin/apxs --with-zlib --enable-zip --enable-ftp --enable-pcntl --enable-soap --with-mcrypt --enable-pdo --with-pear
//./configureの実行結果がざらざらーと
//\Thank you for using PHP/が出ればOK?
make
make install
cp /usr/src/php-5.3.6/php.ini-development /usr/local/bin/php.ini
// /etc/httpd/conf/httpd.confの真下に以下を追加
LoadModule php5_module modules/libphp5.so
AddType application/x-httpd-php .php