How do I get the abbreviation for a phrase in Laravel or php, for instance:

Technical Learning Curve in Front-end should give me TLCIFE

So far this is what I came up with:

function getAbbr($phrase) {
    $words = explode(' ', $phrase);
    $abbreviation = '';
    foreach ($words as $word) {
        $abbreviation .= strtoupper(substr($word, 0, 1));
    }

    return $abbreviation;
}

echo getAbbr("Technical Learning Curve in Front-end");

For now, it works but I was wondering if Laravel or PHP have any native functions or helpers that does it optimally.