A little bit of PHP to return "a" and "an" correctly.

indefinite_article.php

<?

// Usage:
echo "I have ".return_indefinitearticle("apple")." apple, and ".return_indefinitearticle("slice of bread")." slice of bread.";

function return_indefinitearticle($thing) {
    return (preg_match('/^[aeiou]|s\z/i', strtolower($thing))) ? "an" : "a";
}

?>

Here's the answer..

https://github.com/Kaivosukeltaja/php-indefinite-article