Manage Singular and Plural Words

PluralHelper.php

<?php
/**
 * @author James McFadden <james@jamesmcfadden.co.uk>
 */
final class PluralHelper
{
	private static $irregularPluralForms = array(
		'alumnus'		=> 'alumni',
		'analysis'		=> 'analyses',
		'appendix'		=> 'appendices',
		'axis'			=> 'axes',
		'barracks'		=> 'barracks',
		'cactus'		=> 'cacti',
		'child'			=> 'children',
		'criterion'		=> 'criteria',
		'deer'			=> 'deer',
		'echo'			=> 'echoes',
		'elf'			=> 'elves',
		'embargo'		=> 'embargoes',
		'focus'			=> 'foci',
		'fungus'		=> 'fungi',
		'goose'			=> 'geese',
		'hero'			=> 'heroes',
		'hoof'			=> 'hooves',
		'index'			=> 'indices',
		'knife'			=> 'knives',
		'leaf'			=> 'leaves',
		'life'			=> 'lives',
		'man'			=> 'men',
		'mouse'			=> 'mice',
		'nucleus'		=> 'nuclei',
		'person'		=> 'people',
		'phenomenon'		=> 'phenomena',
		'potato'		=> 'potatoes',
		'radius'		=> 'radii',
		'self'			=> 'selves',
		'stimulus'		=> 'stimuli',
		'syllabus'		=> 'syllabi',
		'tomato'		=> 'tomatoes',
		'torpedo'		=> 'torpedoes',
		'veto'			=> 'vetoes',
		'woman'			=> 'women'
	);
	
	/**
	 * Work out whether a word should be plural or singular
	 * 
	 * This is based on the count given, and checks against
	 * some irregular plural forms
	 * 
	 * @param int $count
	 * @param string $word
	 * @return string
	 */
	public static function managePlural($count, $word)
	{	
		$lcWord = trim(strtolower($word));
	
		if($count == 1) {
			if(in_array($lcWord, self::$irregularPluralForms)) {
				return $count . ' ' . array_search($word, self::$irregularPluralForms);
			}
			return $count . ' ' . $word;
		} else {
			if(array_key_exists($lcWord, self::$irregularPluralForms)) {
				return $count . ' ' . self::$irregularPluralForms[$lcWord];
			} else if(in_array($lcWord, self::$irregularPluralForms)) {
				return $count . ' ' . $word;
			}
			return $count . ' ' . $word . 's';
		}
	}
}