PHP dePlural

<?php
 
// Function De-Plural
//
// Take a word that is pluraled and make it singular
// helpful for transforming a string like "users" to "user"
//
// $word -> The word you want to de plural
//
// Please note that this function may or may not be the ultimate
// oxford approved 100% catch all de pluralizer function but should
// work for 90% I hope. Please comment if you have more rules to add.
//
function dePlural($word)
{
 
	$rules = array( 
		'ss' => false, 
		'os' => 'o', 
		'ies' => 'y', 
		'xes' => 'x', 
		'oes' => 'oe', 
		'ies' => 'y', 
		'ves' => 'fe', 
		's' => '',
		'eet' => 'oot'
		// if you know more add them here
	);
 
 
	foreach( $rules as $key => $v )
	{
		// does the word end in a rule?
		if( preg_match( "/".$key."$/" , $word ) )
		{
			// we met that ss rule
			if($key === false) 
			{
				return $word;
			}
			// return the word depluraled
			return preg_replace( "/".$key."$/" , $v , $word ); 
		}
	}
 
	// ok we didn't find any rules so return the original word, sorry.... :(
	return $word;
}
 
 
// testing code probably not what you want to copy.
$tests[] = "rabbitts";
$tests[] = "Zebras";
$tests[] = "Toes";  // this is a breaker O well!
$tests[] = "vegetables";
$tests[] = "cities";
$tests[] = "ex-wives";
$tests[] = "sexes";
$tests[] = "feet";
 
foreach( $tests as $w )
{
	echo dePlural( $w ) . "<br />\n";
}
 
 
 
 
?>