这里是PHP的实现方法,其实在csharp或java中,实现方式都是差不多的。
$plural = array(
array( '/(quiz)$/i', "$1zes" ),
array( '/^(ox)$/i', "$1en" ),
array( '/([m|l])ouse$/i', "$1ice" ),
array( '/(matr|vert|ind)ix|ex$/i', "$1ices" ),
array( '/(x|ch|ss|sh)$/i', "$1es" ),
array( '/([^aeiouy]|qu)y$/i', "$1ies" ),
array( '/([^aeiouy]|qu)ies$/i', "$1y" ),
array( '/(hive)$/i', "$1s" ),
array( '/(?:([^f])fe|([lr])f)$/i', "$1$2ves" ),
array( '/sis$/i', "ses" ),
array( '/([ti])um$/i', "$1a" ),
array( '/(buffal|tomat)o$/i', "$1oes" ),
array( '/(bu)s$/i', "$1ses" ),
array( '/(alias|status)$/i', "$1es" ),
array( '/(octop|vir)us$/i', "$1i" ),
array( '/(ax|test)is$/i', "$1es" ),
array( '/s$/i', "s" ),
array( '/$/', "s" )
);
$singular = array(
array("/s$/", ""),
array("/(n)ews$/", "$1ews"),
array("/([ti])a$/", "$1um"),
array("/((a)naly|(b)a|(d)iagno|(p)arenthe|(p)rogno|(s)ynop|(t)he)ses$/", "$1$2sis"),
array("/(^analy)ses$/", "$1sis"),
array("/([^f])ves$/", "$1fe"),
array("/(hive)s$/", "$1"),
array("/(tive)s$/", "$1"),
array("/([lr])ves$/", "$1f"),
array("/([^aeiouy]|qu)ies$/", "$1y"),
array("/(s)eries$/", "$1eries"),
array("/(m)ovies$/", "$1ovie"),
array("/(x|ch|ss|sh)es$/", "$1"),
array("/([m|l])ice$/", "$1ouse"),
array("/(bus)es$/", "$1"),
array("/(o)es$/", "$1"),
array("/(shoe)s$/", "$1"),
array("/(cris|ax|test)es$/", "$1is"),
array("/([octop|vir])i$/", "$1us"),
array("/(alias|status)es$/", "$1"),
array("/^(ox)en/", "$1"),
array("/(vert|ind)ices$/", "$1ex"),
array("/(matr)ices$/", "$1ix"),
array("/(quiz)zes$/", "$1")
);
$irregular = array(
array( 'move', 'moves' ),
array( 'sex', 'sexes' ),
array( 'child', 'children' ),
array( 'man', 'men' ),
array( 'person', 'people' )
);
$uncountable = array(
'sheep',
'fish',
'series',
'species',
'money',
'rice',
'information',
'equipment'
);
// save some time in the case that singular and plural are the same
if ( in_array( strtolower( $string ), $uncountable ) )
return $string;
// check for irregular singular forms
foreach ( $irregular as $noun )
{
if ( strtolower( $string ) == $noun[0] )
return $noun[1];
}
// check for matches using regular expressions
foreach ( $plural as $pattern )
{
if ( preg_match( $pattern[0], $string ) )
return preg_replace( $pattern[0], $pattern[1], $string );
}
return $string;
}