I have a custom PHP function called display that fetches and echoes values based on a provided key. I’m using Twig for templating in my project and I want to be able to call this display function directly within Twig templates.

Is there a way to call custom PHP functions from Twig? If so, how can I achieve this?

I’m looking for a solution that allows me to use a syntax like the following in my Twig templates

<p>{{ display('welcomeMessage') }}</p>

For context, below is my php function for loading and echoing language key values:

function display($key) {
    global $languageData;
    $lang = getPreferredLanguage();
    foreach ($languageData as $data) {
        if ($data['key'] === $key && $data['subfolder'] === $lang) {
            echo $data['value'];
            return;
        }
    }
    // If key is not found:
    echo "[Translation not found for key: $key]";
}

Any guidance on how to accomplish this would be greatly appreciated.