setLanguageDirectory($languageDirectory); $this->setDefaultLanguage($defaultLanguage); } public function getLanguageDirectory() { return $this->languageDirectory; } private function setLanguageDirectory($languageDirectory) { $this->languageDirectory = $languageDirectory; } public function getDefaultLanguage() { return $this->defaultLanguage; } private function setDefaultLanguage($defaultLanguage) { $this->defaultLanguage = $defaultLanguage; } public function includeLanguage($language = null) { $language = ($language && $this->isValidLanguage($language)) ? $language : $this->getUserLanguage(); if(!$this->checkCookie($language)) { $this->createCookie($language); } return $this->getLanguageDirectory() . '/' . $this->formatLanguageFileName($language); } public function printLanguageOptions() { $optionsString = ''; foreach($this->getLanguages() as $language) { $optionsString .= "getUserLanguage() ? 'selected' : '') . "> \n"; } return $optionsString; } private function getLanguages() { $languages = array(); foreach(scandir($this->getLanguageDirectory()) as $language) { $language = $this->formatLanguageName($language); if($this->isValidLanguage($language)) { $languages[] = $language; } } return $languages; } private function getUserLanguage() { if(isset($_GET["lang"]) && $this->isValidLanguage($_GET["lang"])) { $language = $_GET["lang"]; } else if(isset($_COOKIE["lang"]) && $this->isValidLanguage($_COOKIE["lang"])) { $language = $_COOKIE["lang"]; } else { $language = $this->getDefaultLanguage(); } return $language; } private function checkCookie($language) { return (isset($_COOKIE['lang']) && $_COOKIE['lang'] == $language); } private function createCookie($language) { setcookie("lang", $language, time()+31536000); header("Location: ".strtok($_SERVER['REQUEST_URI'], '?')); } private function isValidLanguage($language) { $languageFile = $this->formatLanguageFileName($language); return (file_exists($this->getLanguageDirectory() . '/' . $languageFile) && is_file($this->getLanguageDirectory() . '/' . $languageFile) && preg_match("/^([a-z-]{2,5})$/i", $language)); } private function formatLanguageFileName($language) { return $language . '.php'; } private function formatLanguageName($language) { return str_replace('.php', '', $language); } }