codejobs - Pluralize Words - PHP

pluralize.php

<?php
function pluralize($word) {		
	$uncountable = array("sheep",
			     "fish",
			     "deer",
			     "series",
			     "species",
			     "money",
			     "rice",
			     "information",
			     "equipment"
	);	
	
	$irregular = array("move"   => "moves",
			   "foot"   => "feet",
			   "goose"  => "geese",
	    		   "sex"    => "sexes",
			   "child"  => "children",
			   "man"    => "men",
			   "tooth"  => "teeth",
			   "person" => "people"
	);	
	
	$plural = array(	"/(quiz)$/i"               		=> "$1zes",
				"/^(ox)$/i"                		=> "$1en",
				"/([m|l])ouse$/i"          		=> "$1ice",
				"/(matr|vert|ind)ix|ex$/i" 		=> "$1ices",
				"/(x|ch|ss|sh)$/i"         		=> "$1es",
				"/([^aeiouy]|qu)y$/i"      		=> "$1ies",
				"/(hive)$/i"               		=> "$1s",
				"/(?:([^f])fe|([lr])f)$/i" 		=> "$1$2ves",
				"/(shea|lea|loa|thie)f$/i" 		=> "$1ves",
				"/sis$/i"                  		=> "ses",
				"/([ti])um$/i"             		=> "$1a",
				"/(tomat|potat|ech|her|vet)o$/i"        => "$1oes",
				"/(bu)s$/i"                		=> "$1ses",
				"/(alias)$/i"              		=> "$1es",
				"/(octop)us$/i"            		=> "$1i",
				"/(ax|test)is$/i"          		=> "$1es",
				"/(us)$/i"                 		=> "$1es",
				"/s$/i"                    		=> "s",
				"/$/"                      		=> "s"
	);	
				
	if(in_array(strtolower($word), $uncountable)) {
		return $word;
	}
	
	foreach($irregular as $pattern => $result) {
		$pattern = "/$pattern$/i";
		
		if(preg_match($pattern, $word)) {
			return preg_replace($pattern, $result, $word);
		}
	}

	foreach($plural as $pattern => $result) {
		if(preg_match($pattern, $word)) {
			return preg_replace($pattern, $result, $word);
		}
	}
	
	return $word;
}
?>