: The simple answer is that most of the PHP functionallity is in the basic setup and you probally don't need to worry about this. But, extensions are exactly as they sound like, they extend

@Chiappetta492

The simple answer is that most of the PHP functionallity is in the basic setup and you probally don't need to worry about this.

But, extensions are exactly as they sound like, they extend PHP functionallity. You have a MYSQL extension which allows you to connect to a database with premade functions (this extension is mostly on by default, unless you have a bad hoster).

If you do phpinfo(); in a php file, there will be a section called 'modules loaded', which lists all of them. Most of the usefull ones are already included.

Turning these extensions on is possible via various methods, often in the php.ini (the settings file for PHP). If you want to change this, you'll need root access to the server, which you often dont have with shared hosting (but, again, you don't really need this when you just begin).

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