The If Statement is a way to make decisions based upon the result of a condition. For example, you might have a script that checks if boolean value is true or false, if variable contains number or string value, if an object is empty or populated, etc. The condition can be anything you choose, and you can combine conditions together to make for actions that are more complicated.
Hopefully you know what PHP is already. If not I'd better explain it. Right, PHP is a scripting language that you embed in web pages to do advanced stuff. But unlike HTML, PHP is not sent straight to the client to work out it is converted into HTML on the server it is running on and then sent to the client. So this allows you to have a database server set up on your server and you can request records from it whatever way you want! Also because the PHP code is worked out on the server clients are unable to see the PHP code in the page just the outputted HTML!!!
PHP is an HTML-embedded scripting language. Much of its syntax is borrowed from C, Java, and Perl with a couple of unique PHP-specific features included. The goal of the language is to give web developers the ability to quickly write dynamically generated pages.
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