Surprising behaviour of try/catch/finally block with return statements

example.php

<?php

function exceptionThrower()
{
    try {
        throw new \Exception('Bang!');
    } catch(\Exception $e) {
        echo 'An exception happened but I caught it!' . PHP_EOL;
        return 5;
    } finally {
        echo 'I am just doing some cleanup...' . PHP_EOL;
        return 10;
    }
}

echo 'The result is ' . exceptionThrower();

/**
 * An exception happened but I caught it!
 * I am just doing some cleanup...
 * The result is 10
 */