PHP Simple HTML DOM Parser Script

In this post I have explained some elements to scrap data from external websites.
Simple HTML DOM parser is a PHP 5+ class which is useful to manipulate HTML elements. This class can work with both valid HTML and HTML pages that do not pass W3C validation. You can find elements by ids, classes, tags and many more. You can also add, delete or alter DOM elements. The only one thing you should care about is memory leaks – but you can avoid memory leaks as explained later.
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Unpacking binary data in PHP

Working with binary files in PHP is rarely a requirement. However when needed the PHP ‘pack’ and ‘unpack’ functions can help you tremendously. To set the stage we will start with a programming problem, this will keep the discussion anchored to a relevant context. The problem is this : We want to write a function that takes a image file as an argument and tells us whether the file is a GIF image; irrelevant with whatever the extension the file may have. We are not to use any GD library functions.
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