HTML & PHP Code

Question: How can my applet require some optional packages (specific vendor and versions)? (Java)

Java Tips Question: What are restrictions for an applet? What are applets prevented from doing? Answer: In general, applets loaded over the net are prevented from reading and writing files on the client file system, and from making network connections except to the originating host. In addition, applets loaded over the net are prevented from starting other programs on the client. Applets loaded over the net are also not allowed to load libraries, or to define native method calls. If an applet could define native method calls, which would give the applet direct access to the underlying computer.

Java (J2EE) has three kinds of Java beans: 1. Session beans -represent transient conversations with clients. The data will be gone after a session is over 2. Entity beans -represent persistent data and let to store data in a database. 3. Message driven beans - combining features of a session bean and Java Message Service (JMS). They provide possibility to receive asynchronous JMS messages

Variables in PHP are quite different from compiled languages such as C and Java. This is because their weakly typed nature, which in short means you don’t need to declare variables before using them, you don’t need to declare their type and, as a result, a variable can change the type of its value as much as you want.

The first thing you need to learn about PHP is how it is embedded in HTML:

Another appliance of hash functions is authenticating a password entered in a form on your web site with a password stored in your database.

Cookies PHP

A PHP session allows an application to store information for the current “session,” which can be defined as one user being logged in to your application. A session is identified by a unique session ID.

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