1.[代码]参考ROR中的单复数转换，写一个PHP的单复数转换类$inflector = new Inflector();

echo $inflector->pluralize('bus') . '
';

echo $inflector->singularize('buses') . '
';

2.[文件]

inflector.php<?php

class Inflector {

private $plural = array();

private $singular = array();

private $irregular = array();

private $uncountable = array();

public function __construct() {

$this->_update_plural();

$this->_update_singular();

$this->_update_irregular();

$this->_update_uncountable();

}

public function pluralize($word) {

return $this->_apply_inflections($word, $this->plural);

}

public function singularize($word) {

return $this->_apply_inflections($word, $this->singular);

}

private function _apply_inflections($word, $rules) {

$result = $word;

if (empty($result)) return $result;

if (sizeof($this->uncountable) > 0) {

foreach($this->uncountable as $u) {

if (preg_match("#^{$u}$#", $result)) {

return $result;

}

}

}

for($i = (sizeof($rules) - 1); $i >=0; $i--) {

$rule = $rules[$i];

if (preg_match($rule[0], $result)) {

$result = preg_replace($rule[0], $rule[1], $result);

break;

}

}

return $result;

}

private function _update_plural() {

$this->_plural('/$/', 's');

$this->_plural('/s$/i', 's');

$this->_plural('/(ax|test)is$/i', '\1es');

$this->_plural('/(octop|vir)us$/i', '\1i');

$this->_plural('/(octop|vir)i$/i', '\1i');

$this->_plural('/(alias|status)$/i', '\1es');

$this->_plural('/(bu)s$/i', '\1ses');

$this->_plural('/(buffal|tomat)o$/i', '\1oes');

$this->_plural('/([ti])um$/i', '\1a');

$this->_plural('/([ti])a$/i', '\1a');

$this->_plural('/sis$/i', 'ses');

$this->_plural('/(?:([^f])fe|([lr])f)$/i', '\1\2ves');

$this->_plural('/(hive)$/i', '\1s');

$this->_plural('/([^aeiouy]|qu)y$/i', '\1ies');

$this->_plural('/(x|ch|ss|sh)$/i', '\1es');

$this->_plural('/(matr|vert|ind)(?:ix|ex)$/i', '\1ices');

$this->_plural('/(m|l)ouse$/i', '\1ice');

$this->_plural('/(m|l)ice$/i', '\1ice');

$this->_plural('/^(ox)$/i', '\1en');

$this->_plural('/^(oxen)$/i', '\1');

$this->_plural('/(quiz)$/i', '\1zes');

}

private function _update_singular() {

$this->_singular('/s$/i', '');

$this->_singular('/(n)ews$/i', '\1ews');

$this->_singular('/([ti])a$/i', '\1um');

$this->_singular('/((a)naly|(b)a|(d)iagno|(p)arenthe|(p)rogno|(s)ynop|(t)he)ses$/i', '\1\2sis');

$this->_singular('/(^analy)ses$/i', '\1sis');

$this->_singular('/([^f])ves$/i', '\1fe');

$this->_singular('/(hive)s$/i', '\1');

$this->_singular('/(tive)s$/i', '\1');

$this->_singular('/([lr])ves$/i', '\1f');

$this->_singular('/([^aeiouy]|qu)ies$/i', '\1y');

$this->_singular('/(s)eries$/i', '\1eries');

$this->_singular('/(m)ovies$/i', '\1ovie');

$this->_singular('/(x|ch|ss|sh)es$/i', '\1');

$this->_singular('/(m|l)ice$/i', '\1ouse');

$this->_singular('/(bus)es$/i', '\1');

$this->_singular('/(o)es$/i', '\1');

$this->_singular('/(shoe)s$/i', '\1');

$this->_singular('/(cris|ax|test)es$/i', '\1is');

$this->_singular('/(octop|vir)i$/i', '\1us');

$this->_singular('/(alias|status)es$/i', '\1');

$this->_singular('/^(ox)en/i', '\1');

$this->_singular('/(vert|ind)ices$/i', '\1ex');

$this->_singular('/(matr)ices$/i', '\1ix');

$this->_singular('/(quiz)zes$/i', '\1');

$this->_singular('/(database)s$/i', '\1');

}

private function _update_irregular() {

$this->_irregular('person', 'people');

$this->_irregular('man', 'men');

$this->_irregular('child', 'children');

$this->_irregular('sex', 'sexes');

$this->_irregular('move', 'moves');

$this->_irregular('cow', 'kine');

$this->_irregular('zombie', 'zombies');

}

private function _update_uncountable() {

$this->_uncountable('equipment');

$this->_uncountable('information');

$this->_uncountable('rice');

$this->_uncountable('money');

$this->_uncountable('species');

$this->_uncountable('series');

$this->_uncountable('fish');

$this->_uncountable('sheep');

$this->_uncountable('jeans');

}

private function _plural($rule, $replacement) {

if (is_string($rule)) unset($this->uncountable[$rule]);

unset($this->uncountable[$replacement]);

$this->plural[sizeof($this->plural)] = array($rule, $replacement);

}

private function _singular($rule, $replacement) {

if (is_string($rule)) unset($this->uncountable[$rule]);

unset($this->uncountable[$replacement]);

$this->singular[sizeof($this->singular)] = array($rule, $replacement);

}

private function _irregular($singular, $plural) {

unset($this->uncountable[$singular]);

unset($this->uncountable[$plural]);

if (strtoupper(substr($singular, 0, 1)) == strtoupper(substr($plural, 0, 1))) {

$this->_plural('/(' . substr($singular, 0, 1) . ')' . substr($singular, 1) . '$/i', '\1' . substr($plural, 1));

$this->_plural('/(' . substr($plural, 0, 1) . ')' . substr($plural, 1) . '$/i', '\1' . substr($plural, 1));

$this->_singular('/(' . substr($plural, 0, 1) . ')' . substr($plural, 1) . '$/i', '\1' . substr($singular, 1));

} else {

$this->_plural('/' . strtoupper(substr($singular, 0, 1)) . '(?i)' . substr($singular, 1) . '$/',

strtoupper(substr($plural, 0, 1)) . substr($plural, 1));

$this->_plural('/' . strtolower(substr($singular, 0, 1)) . '(?i)' . substr($singular, 1) . '$/',

strtolower(substr($plural, 0, 1)) . substr($plural, 1));

$this->_plural('/' . strtoupper(substr($plural, 0, 1)) . '(?i)' . substr($plural, 1) . '$/',

strtoupper(substr($plural, 0, 1)) . substr($plural, 1));

$this->_plural('/' . strtolower(substr($plural, 0, 1)) . '(?i)' . substr($plural, 1) . '$/',

strtolower(substr($plural, 0, 1)) . substr($plural, 1));

$this->_singular('/' . strtoupper(substr($plural, 0, 1)) . '(?i)' . substr($plural, 1) . '$/',

strtoupper(substr($singular, 0, 1)) . substr($singular, 1));

$this->_singular('/' . strtolower(substr($plural, 0, 1)) . '(?i)' . substr($plural, 1) . '$/',

strtolower(substr($singular, 0, 1)) . substr($singular, 1));

}

}

private function _uncountable($word) {

$this->uncountable[] = $word;

}

}

/* End of file inflector.php */

/* Location: ./application/libraties/inflector.php */

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