Ouzo\Utilities\Inflector::singularize PHP Метод

    public static function singularize($word)
    {
        if (isset(self::$cache['singularize'][$word])) {
            return self::$cache['singularize'][$word];
        }
        if (!isset(self::$singular['merged']['uninflected'])) {
            self::$singular['merged']['uninflected'] = array_merge(self::$singular['uninflected'], self::$uninflected);
        }
        if (!isset(self::$singular['merged']['irregular'])) {
            self::$singular['merged']['irregular'] = array_merge(self::$singular['irregular'], array_flip(self::$plural['irregular']));
        }
        if (!isset(self::$singular['cacheUninflected']) || !isset(self::$singular['cacheIrregular'])) {
            self::$singular['cacheUninflected'] = '(?:' . join('|', self::$singular['merged']['uninflected']) . ')';
            self::$singular['cacheIrregular'] = '(?:' . join('|', array_keys(self::$singular['merged']['irregular'])) . ')';
        }
        if (preg_match('/(.*)\\b(' . self::$singular['cacheIrregular'] . ')$/i', $word, $regs)) {
            self::$cache['singularize'][$word] = $regs[1] . substr($word, 0, 1) . substr(self::$singular['merged']['irregular'][strtolower($regs[2])], 1);
            return self::$cache['singularize'][$word];
        }
        if (preg_match('/^(' . self::$singular['cacheUninflected'] . ')$/i', $word, $regs)) {
            self::$cache['singularize'][$word] = $word;
            return $word;
        }
        foreach (self::$singular['rules'] as $rule => $replacement) {
            if (preg_match($rule, $word)) {
                self::$cache['singularize'][$word] = preg_replace($rule, $replacement, $word);
                return self::$cache['singularize'][$word];
            }
        }
        self::$cache['singularize'][$word] = $word;
        return $word;
    }

 /**
  * Test resetting inflection rules.
  *
  * @return void
  */
 public function testCustomRuleWithReset()
 {
     Inflector::reset();
     $uninflected = array('atlas', 'lapis', 'onibus', 'pires', 'virus', '.*x');
     $pluralIrregular = array('as' => 'ases');
     Inflector::rules('singular', array('rules' => array('/^(.*)(a|e|o|u)is$/i' => '\\1\\2l'), 'uninflected' => $uninflected), true);
     Inflector::rules('plural', array('rules' => array('/^(.*)(a|e|o|u)l$/i' => '\\1\\2is'), 'uninflected' => $uninflected, 'irregular' => $pluralIrregular), true);
     $this->assertEquals(Inflector::pluralize('Alcool'), 'Alcoois');
     $this->assertEquals(Inflector::pluralize('Atlas'), 'Atlas');
     $this->assertEquals(Inflector::singularize('Alcoois'), 'Alcool');
     $this->assertEquals(Inflector::singularize('Atlas'), 'Atlas');
 }