Double Linked List in php

Below is a non circular double linked list php implementation. I do not frequently encounter linked-list coding in practice, but doing it just for the fun of it feels nice; also helps to brush up on those data structure theories.

Main Code:

Linked List in PHP How to

Data structures are one of the core elements of computer science and they are also fun to program. But being a web developer the opportunity for implementing them in any application is quite rare. But then I thought, What the heck! I can just code for the joy of it, and it will also help me brush up on my DS skills. So here it is, a single linked list implementation in PHP for whoever may care. I will be posting other data structure and algorithm implementations here, so keeping watching. The code is given below.

CODE:

PHP & MySQL: The ORDER BY Keyword

The ORDER BY keyword is used to sort the data in a recordset.

The ORDER BY keyword sort the records in ascending order by default.

If you want to sort the records in a descending order, you can use the DESC keyword.

Create an Upload-File Form

To allow users to upload files from a form can be very useful.

Look at the following HTML form for uploading files:

PHP MySQL Select

The SELECT statement is used to select data from a database.
Syntax:
SELECT column_name(s) FROM table_name

To get PHP to execute the statement above we must use the mysql_query() function. This function is used to send a query or command to a MySQL connection.

PHP Redirects

You can use a simple PHP script to redirect a user from the page they entered to a different web page. One reason you may want to do this is that the page they are trying to access no longer exists. Using this method, they can be seamlessly transfered to the new page without having to click a link to continue.
* Users are redirected quickly and seamlessly
* When using the 'Back' button, the user is taken to the last viewed page, not the redirect page
* Works on all browsers