Amazon Virtual Private Cloud (Amazon VPC) is a secure and seamless bridge between a company’s existing IT infrastructure and the AWS cloud. Amazon VPC enables enterprises to connect their existing infrastructure to a set of isolated AWS compute resources via a Virtual Private Network (VPN) connection, and to extend their existing management capabilities such as security services, firewalls, and intrusion detection systems to include their AWS resources. Amazon VPC integrates today with Amazon EC2, and will integrate with other AWS services in the future. As with all Amazon Web Services, there are no long-term contracts, minimum spend or up-front investments required. With Amazon VPC, you pay only for the resources you use.

RewriteEngine on

command, i got the following error, when starting Apache:

Invalid command ‘RewriteEngine’

To fix this problem, i executed

sudo a2enmod rewrite

to enable the Rewrite module.

function gup( name )
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  if( results == null )
    return "";
  else
    return results[1];
}

exec("/usr/bin/php /path/background.php > /dev/null 2>&1 &");

It is necessary to redirect the output of the child process (here: /dev/null). Also if the parent process dies, the child process will run independently.

Just visited Twitter to see how they implemented their Captcha functionality and then i saw that they use reCAPTCHA. I’ve never heard of this before, but it seems to be really cool and easy to use:

reCAPTCHA helps prevent automated abuse of your site (such as comment spam or bogus registrations) by using a CAPTCHA to ensure that only humans perform certain actions.
[...]
reCAPTCHA is a Web service. [...] For many applications and programming languages such as Wordpress and PHP we also have easy-to-install plugins available.

And the best: it’s free!

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The Dojo Toolkit is an Open-Source javascript library used for rapid development of robust, scalable, rich web projects and applications … with Drag and Drop, Animations, Ajax, Events and other goodies.

mootools

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Ext JS

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script.aculo.us

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Yahoo! User Interface Library

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jQuery

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