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PHP Includes

PHP Includes allow you to include one PHP file or HTML file inside of another. So let's make a file in which we can store all of our functions. Let's call that file functions,php. Then let's put a greeting function in there.

<?php

    function greeting(){
        return 'Welcome to Includes';
    }

?>

Now, if we want to use this function everywhere, we just have to add the functions.php file in all the other files using a function called include like this:

<?php
    include "functions.php";
?>
<!DOCTYPE html>
<html>
<head>
    <title>My First PHP App</titile>
</head>
<body>
   
    <h1>Home Page</h1>

    <p><?php echo greeting(); ?></p>

</body>
</html>

The include function has to be at the top of our file, just like the session_start function.

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