How can variables in an included file be accessed and used in functions in PHP?

To access variables in an included file and use them in functions in PHP, you can use the global keyword to make the variables accessible within the function scope. By declaring the variables as global inside the function, you can access and modify their values. This allows you to use variables from included files in functions without having to pass them as parameters. 

// Included file (included_file.php)
$includedVar = "Hello, world!";

// Main file
include 'included_file.php';

function useIncludedVar() {
    global $includedVar;
    echo $includedVar;
}

useIncludedVar(); // Output: Hello, world!

Keywords

PHP included files variables functions scope

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