How can PHP functions be defined and called in separate files?

To define and call PHP functions in separate files, you can create a separate PHP file for each function and then include these files in your main PHP script using the `include` or `require` statement. This way, you can organize your code more effectively and reuse functions across multiple scripts. 

// functions.php
function greet() {
    echo "Hello, World!";
}

// main.php
require 'functions.php';
greet();

Keywords

PHP functions separate files include require

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