I18n::_bindTextDomain PHP Method

    protected function _bindTextDomain($domain)
    {
        $this->_noLocale = true;
        $core = true;
        $merge = array();
        $searchPaths = App::path('locales');
        $plugins = CakePlugin::loaded();
        if (!empty($plugins)) {
            foreach ($plugins as $plugin) {
                $pluginDomain = Inflector::underscore($plugin);
                if ($pluginDomain === $domain) {
                    $searchPaths[] = CakePlugin::path($plugin) . 'Locale' . DS;
                    if (!Configure::read('I18n.preferApp')) {
                        $searchPaths = array_reverse($searchPaths);
                    }
                    break;
                }
            }
        }
        foreach ($searchPaths as $directory) {
            foreach ($this->l10n->languagePath as $lang) {
                $localeDef = $directory . $lang . DS . $this->category;
                if (is_file($localeDef)) {
                    $definitions = static::loadLocaleDefinition($localeDef);
                    if ($definitions !== false) {
                        $this->_domains[$domain][$this->_lang][$this->category] = $definitions;
                        $this->_noLocale = false;
                        return $domain;
                    }
                }
                if ($core) {
                    $app = $directory . $lang . DS . $this->category . DS . 'core';
                    $translations = false;
                    if (is_file($app . '.mo')) {
                        $translations = static::loadMo($app . '.mo');
                    }
                    if ($translations === false && is_file($app . '.po')) {
                        $translations = static::loadPo($app . '.po');
                    }
                    if ($translations !== false) {
                        $this->_domains[$domain][$this->_lang][$this->category] = $translations;
                        $merge[$domain][$this->_lang][$this->category] = $this->_domains[$domain][$this->_lang][$this->category];
                        $this->_noLocale = false;
                        $core = null;
                    }
                }
                $file = $directory . $lang . DS . $this->category . DS . $domain;
                $translations = false;
                if (is_file($file . '.mo')) {
                    $translations = static::loadMo($file . '.mo');
                }
                if ($translations === false && is_file($file . '.po')) {
                    $translations = static::loadPo($file . '.po');
                }
                if ($translations !== false) {
                    $this->_domains[$domain][$this->_lang][$this->category] = $translations;
                    $this->_noLocale = false;
                    break 2;
                }
            }
        }
        if (empty($this->_domains[$domain][$this->_lang][$this->category])) {
            $this->_domains[$domain][$this->_lang][$this->category] = array();
            return $domain;
        }
        if (isset($this->_domains[$domain][$this->_lang][$this->category][""])) {
            $head = $this->_domains[$domain][$this->_lang][$this->category][""];
            foreach (explode("\n", $head) as $line) {
                $header = strtok($line, ':');
                $line = trim(strtok("\n"));
                $this->_domains[$domain][$this->_lang][$this->category]["%po-header"][strtolower($header)] = $line;
            }
            if (isset($this->_domains[$domain][$this->_lang][$this->category]["%po-header"]["plural-forms"])) {
                $switch = preg_replace("/(?:[() {}\\[\\]^\\s*\\]]+)/", "", $this->_domains[$domain][$this->_lang][$this->category]["%po-header"]["plural-forms"]);
                $this->_domains[$domain][$this->_lang][$this->category]["%plural-c"] = $switch;
                unset($this->_domains[$domain][$this->_lang][$this->category]["%po-header"]);
            }
            $this->_domains = Hash::mergeDiff($this->_domains, $merge);
            if (isset($this->_domains[$domain][$this->_lang][$this->category][null])) {
                unset($this->_domains[$domain][$this->_lang][$this->category][null]);
            }
        }
        return $domain;
    }