How can PHP functions be used across multiple pages?

To use PHP functions across multiple pages, you can create a separate PHP file containing the functions you want to reuse and then include this file in your other PHP pages using the include or require statement. 

// functions.php
<?php
function greetUser($name) {
    echo "Hello, $name!";
}
?>

// index.php
<?php
include 'functions.php';
greetUser('John');
?>

Keywords

PHP functions multiple pages code reuse include statement global functions

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