The new PHP 5.4 is out, and it’s really awesome (for being PHP). Among it’s many new features is a new shortened array syntax similar to Ruby, Python, and JavaScript. I remember when I was into PHP a few years ago this was the biggest request from developers and PHP core-team was vehemently against it. It seems they have given in and now the code looks way nicer and fun to write:

foreach (['common', 'model'] as $class_path) {
    spl_autoload_register(function($class) use ($class_path, $doc_root) {
        $class_path = "$doc_root/classes/$class_path/$class.class.php";
        if (file_exists($class_path))
            require_once($class_path);
    });
}

To upgrade your Centos LAMP stack compile PHP 5.4 like so:

cd /tmp
wget http://www.php.net/get/php-5.4.0.tar.gz/from/a/mirror
tar xzf php-5.4.0.tar.gz
cd php-5.4.0*
./configure --with-apxs2=/usr/sbin/apxs --with-mysq --with-mcrypt --without-iconv # --with-mcrypt=/opt/local for OS X
make
make test
sudo make install

Mcrypt param is optional if you don’t have it and need it. 

sudo yum | apt-get | port install libmcrypt # libmcrypt-devel for centos