// PHP
$knownLanguages = ['PHP','HTML','CSS','JS','SQL'];

foreach ($knownLanguages as $item) {
    echo "Ask me when you need some $item help =) <br>";
}

// JS
knownLanguages = ['PHP','HTML','CSS','JS with jQuery','SQL'];

for (var i = knownLanguages.length - 1; i >= 0; i--) {
    document.write("Ask me when you need some " + knownLanguages[i] + " help =) <br>");
}