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";
}

?>

Unfortunately, no..

[PASS] apple ............... Result: an .... Expected: an
[PASS] dog ................. Result: a .... Expected: a
[PASS] house ............... Result: a .... Expected: a
[FAIL] hour ................ Result: a .... Expected: an
[FAIL] university .......... Result: an .... Expected: a
[PASS] yellow dog .......... Result: a .... Expected: a
[FAIL] ytterbium molecule .. Result: a .... Expected: an
[FAIL] U ................... Result: an .... Expected: a
[FAIL] M ................... Result: a .... Expected: an
[PASS] umbrella ............ Result: an .... Expected: an

Here's the answer..

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