goat_latin.php

<?php

/**
 * Goat Latin is a made-up language based off of English, sort of like Pig Latin.
 *
 * The rules of Goat Latin are as follows:
 * 1. If a word begins with a consonant (i.e. not a vowel), remove the first letter and append it to the end, then add 'ma'.
 * For example, the word 'goat' becomes 'oatgma'.
 *
 * 2. If a word begins with a vowel, append 'ma' to the end of the word.
 * For example, the word 'i' becomes 'ima'.
 *
 * 3. Add one letter "a" to the end of each word per its word index in the sentence, starting with 1.
 * That is, the first word gets "a" added to the end, the second word gets "aa" added to the end, the third word in
 * the sentence gets "aaa" added to the end, and so on.
 *
 * Write a function that, given a string of words making up one sentence, returns that sentence in Goat Latin. For example:
 *
 * string_to_goat_latin('I speak Goat Latin') would return: 'Imaa peaksmaaa oatGmaaaa atinLmaaaaa'
 *
 */

error_reporting(E_ALL);

/**
 * Translates from Latin to Goat Latin
 *
 * @param $input
 * @return string
 */
function string_to_goat_latin($input)
{
    $array = explode(" ", $input);
    $translation = array();

    $count = 1;
    foreach ($array as $word) {
        $translation[] = translate($word, $count);
        $count++;
    }

    $translation = implode(" ", $translation);

    return $translation;
}

/**
 * Apply the diferent rules for translate from Latin to Goat Latin
 *
 * @param $word
 * @param $count
 * @return string
 */
function translate($word, $count)
{
    $tranlation = $word;

    if (!empty($tranlation)) {
        if (testStartWithVowel($word)) {
            $tranlation = vowel($word);
        } elseif (testStartWithConsonant($word)) {
            $tranlation = consonant($word);
        }
        $tranlation = append($tranlation, $count);
    }

    return $tranlation;
}

/**
 * Apply the 1st modifier for the Goat Latin language
 *
 * @param $word
 * @return string
 */
function consonant($word)
{
    return substr($word, 1).$word[0].'ma';
}

/**
 * Apply the 2nd modifier for the Goat Latin language
 *
 * @param $word
 * @return string
 */
function vowel($word)
{
    return $word.'ma';
}

/**
 * Apply the 3rd modifier for the Goat Latin language
 *
 * @param $word
 * @param $count
 * @return string
 */
function append($word, $count)
{
    $append = "a";
    for ($i=1;$i<$count;$i++) {
        $append .= 'a';
    }
    return $word.$append;
}

/**
 * * Checks if $word start with consonant
 *
 * @param $word
 * @return bool
 */
function testStartWithConsonant($word)
{
    $regex = '/^[b-df-hj-np-tv-z]/i';

    if (preg_match($regex, $word)) {
        return true;
    }

    return false;
}

/**
 * Checks if $word start with vowel
 *
 * @param $word
 * @return bool
 */
function testStartWithVowel($word)
{
    $regex = '/^[aeiou]/i';

    if (preg_match($regex, $word)) {
        return true;
    }

    return false;
}

echo string_to_goat_latin('I speak Goat Latin');