Using PHP's built-in functions

- In this chapter, we'll dive into the wonderful world…of PHP functions.…PHP has a huge range of built-in function…designed to perform predefined tasks,…such as converting a string to uppercase,…getting the dimensions of an image,…sending an email, and so on.…In this video, we'll look at the basics…of working with functions.…And in this file, functions.php,…is an example of a built-in PHP function.…It's phpversion that repots the version of PHP…that's running on your server.…

The first thing to note about all functions…is that after the function name,…you'll always get a pair of parentheses.…The parentheses are like an operator…that tells the function to execute its predefined task,…but if I load this page into a browser,…I get a blank screen…and that's because most functions return a value,…but unless you do something with it,…it's simply thrown away.…So we could display the value…by using echo in front of phpversion…and that will then display the value that's returned.…

So if I load that into the browser,…it now displays the version of PHP that I'm running.…