cd  ~/tmp

wget http://jp.php.net/get/php-5.4.5.tar.bz2/from/this/mirror

tar -jxf php-5.4.5.tar.bz2

cd php-5.4.5

//前回のconfigure
php -i | less

// rootユーザーで実行

./configure [前回のconfigure]

make 

make install