Data encryption with OpenSSL in PHP

PKI is well-known and widely spread technology. It is very easy to use it for data encryption in PHP using the standard OpenSSL extension. Data are encrypted with the public key and decrypted with the private key. There is one restriction though - the size of data encrypted with the public key can be up to the length of the key (usually 1024 or 2048 bytes), which may not be enough. Of course, you could divide your data into chunks and encrypt them separately, but there is a better solution.

File upload widget for ExtJS 4.x

In a project I'm working on, I needed a flexible file upload panel with multiple file upload support. Unfortunately, the ExtJS built-in mechanisms (Ext.form.field.File) does not support multiple upload and there are some other limitations as well. I searched for a user contributed plugin, but I couldn't find a suitable one. Most of the contributions were written for older versions of ExtJS - 3.x or even 2.x. So I decided to write one myself, trying to use some advanced features of HTML5.

You may first check the live demo.