+<?php
+
+/*
+ * Fork this project on GitHub!
+ * https://github.com/Philipp15b/php-i18n
+ *
+ * License: MIT
+ */
+
+class i18n {
+
+ /**
+ * Language file path
+ * This is the path for the language files. You must use the '{LANGUAGE}' placeholder for the language or the script wont find any language files.
+ *
+ * @var string
+ */
+ protected $filePath = './lang/lang_{LANGUAGE}.ini';
+
+ /**
+ * Cache file path
+ * This is the path for all the cache files. Best is an empty directory with no other files in it.
+ *
+ * @var string
+ */
+ protected $cachePath = './langcache/';
+
+ /**
+ * Fallback language
+ * This is the language which is used when there is no language file for all other user languages. It has the lowest priority.
+ * Remember to create a language file for the fallback!!
+ *
+ * @var string
+ */
+ protected $fallbackLang = 'en';
+
+ /**
+ * Merge in fallback language
+ * Whether to merge current language's strings with the strings of the fallback language ($fallbackLang).
+ *
+ * @var bool
+ */
+ protected $mergeFallback = false;
+
+ /**
+ * The class name of the compiled class that contains the translated texts.
+ * @var string
+ */
+ protected $prefix = 'L';
+
+ /**
+ * Forced language
+ * If you want to force a specific language define it here.
+ *
+ * @var string
+ */
+ protected $forcedLang = NULL;
+
+ /**
+ * This is the separator used if you use sections in your ini-file.
+ * For example, if you have a string 'greeting' in a section 'welcomepage' you will can access it via 'L::welcomepage_greeting'.
+ * If you changed it to 'ABC' you could access your string via 'L::welcomepageABCgreeting'
+ *
+ * @var string
+ */
+ protected $sectionSeparator = '_';
+
+
+ /*
+ * The following properties are only available after calling init().
+ */
+
+ /**
+ * User languages
+ * These are the languages the user uses.
+ * Normally, if you use the getUserLangs-method this array will be filled in like this:
+ * 1. Forced language
+ * 2. Language in $_GET['lang']
+ * 3. Language in $_SESSION['lang']
+ * 4. HTTP_ACCEPT_LANGUAGE
+ * 5. Language in $_COOKIE['lang']
+ * 6. Fallback language
+ *
+ * @var array
+ */
+ protected $userLangs = array();
+
+ protected $appliedLang = NULL;
+ protected $langFilePath = NULL;
+ protected $cacheFilePath = NULL;
+ protected $isInitialized = false;
+
+
+ /**
+ * Constructor
+ * The constructor sets all important settings. All params are optional, you can set the options via extra functions too.
+ *
+ * @param string [$filePath] This is the path for the language files. You must use the '{LANGUAGE}' placeholder for the language.
+ * @param string [$cachePath] This is the path for all the cache files. Best is an empty directory with no other files in it. No placeholders.
+ * @param string [$fallbackLang] This is the language which is used when there is no language file for all other user languages. It has the lowest priority.
+ * @param string [$prefix] The class name of the compiled class that contains the translated texts. Defaults to 'L'.
+ */
+ public function __construct($filePath = NULL, $cachePath = NULL, $fallbackLang = NULL, $prefix = NULL) {
+ // Apply settings
+ if ($filePath != NULL) {
+ $this->filePath = $filePath;
+ }
+
+ if ($cachePath != NULL) {
+ $this->cachePath = $cachePath;
+ }
+
+ if ($fallbackLang != NULL) {
+ $this->fallbackLang = $fallbackLang;
+ }
+
+ if ($prefix != NULL) {
+ $this->prefix = $prefix;
+ }
+ }
+
+ public function init() {
+ if ($this->isInitialized()) {
+ throw new BadMethodCallException('This object from class ' . __CLASS__ . ' is already initialized. It is not possible to init one object twice!');
+ }
+
+ $this->isInitialized = true;
+
+ $this->userLangs = $this->getUserLangs();
+
+ // search for language file
+ $this->appliedLang = NULL;
+ foreach ($this->userLangs as $priority => $langcode) {
+ $this->langFilePath = $this->getConfigFilename($langcode);
+ if (file_exists($this->langFilePath)) {
+ $this->appliedLang = $langcode;
+ break;
+ }
+ }
+ if ($this->appliedLang == NULL) {
+ throw new RuntimeException('No language file was found.');
+ }
+
+ // search for cache file
+ $this->cacheFilePath = $this->cachePath . '/php_i18n_' . md5_file(__FILE__) . '_' . $this->prefix . '_' . $this->appliedLang . '.cache.php';
+
+ // whether we need to create a new cache file
+ $outdated = !file_exists($this->cacheFilePath) ||
+ filemtime($this->cacheFilePath) < filemtime($this->langFilePath) || // the language config was updated
+ ($this->mergeFallback && filemtime($this->cacheFilePath) < filemtime($this->getConfigFilename($this->fallbackLang))); // the fallback language config was updated
+
+ if ($outdated) {
+ $config = $this->load($this->langFilePath);
+ if ($this->mergeFallback)
+ $config = array_replace_recursive($this->load($this->getConfigFilename($this->fallbackLang)), $config);
+
+ $compiled = "<?php class " . $this->prefix . " {\n"
+ . $this->compile($config)
+ . 'public static function __callStatic($string, $args) {' . "\n"
+ . ' return vsprintf(constant("self::" . $string), $args);'
+ . "\n}\n}\n"
+ . "function ".$this->prefix .'($string, $args=NULL) {'."\n"
+ . ' $return = constant("'.$this->prefix.'::".$string);'."\n"
+ . ' return $args ? vsprintf($return,$args) : $return;'
+ . "\n}";
+
+ if( ! is_dir($this->cachePath))
+ mkdir($this->cachePath, 0755, true);
+
+ if (file_put_contents($this->cacheFilePath, $compiled) === FALSE) {
+ throw new Exception("Could not write cache file to path '" . $this->cacheFilePath . "'. Is it writable?");
+ }
+ chmod($this->cacheFilePath, 0755);
+
+ }
+
+ require_once $this->cacheFilePath;
+ }
+
+ public function isInitialized() {
+ return $this->isInitialized;
+ }
+
+ public function getAppliedLang() {
+ return $this->appliedLang;
+ }
+
+ public function getCachePath() {
+ return $this->cachePath;
+ }
+
+ public function getFallbackLang() {
+ return $this->fallbackLang;
+ }
+
+ public function setFilePath($filePath) {
+ $this->fail_after_init();
+ $this->filePath = $filePath;
+ }
+
+ public function setCachePath($cachePath) {
+ $this->fail_after_init();
+ $this->cachePath = $cachePath;
+ }
+
+ public function setFallbackLang($fallbackLang) {
+ $this->fail_after_init();
+ $this->fallbackLang = $fallbackLang;
+ }
+
+ public function setMergeFallback($mergeFallback) {
+ $this->fail_after_init();
+ $this->mergeFallback = $mergeFallback;
+ }
+
+ public function setPrefix($prefix) {
+ $this->fail_after_init();
+ $this->prefix = $prefix;
+ }
+
+ public function setForcedLang($forcedLang) {
+ $this->fail_after_init();
+ $this->forcedLang = $forcedLang;
+ }
+
+ public function setSectionSeparator($sectionSeparator) {
+ $this->fail_after_init();
+ $this->sectionSeparator = $sectionSeparator;
+ }
+
+ /**
+ * @deprecated Use setSectionSeparator.
+ */
+ public function setSectionSeperator($sectionSeparator) {
+ $this->setSectionSeparator($sectionSeparator);
+ }
+
+ /**
+ * getUserLangs()
+ * Returns the user languages
+ * Normally it returns an array like this:
+ * 1. Forced language
+ * 2. Language in $_GET['lang']
+ * 3. Language in $_SESSION['lang']
+ * 4. HTTP_ACCEPT_LANGUAGE
+ * 5. Language in $_COOKIE['lang']
+ * 6. Fallback language
+ * Note: duplicate values are deleted.
+ *
+ * @return array with the user languages sorted by priority.
+ */
+ public function getUserLangs() {
+ $userLangs = array();
+
+ // Highest priority: forced language
+ if ($this->forcedLang != NULL) {
+ $userLangs[] = $this->forcedLang;
+ }
+
+ // 2nd highest priority: GET parameter 'lang'
+ if (isset($_GET['lang']) && is_string($_GET['lang'])) {
+ $userLangs[] = $_GET['lang'];
+ }
+
+ // 3rd highest priority: SESSION parameter 'lang'
+ if (isset($_SESSION['lang']) && is_string($_SESSION['lang'])) {
+ $userLangs[] = $_SESSION['lang'];
+ }
+
+ // 4th highest priority: HTTP_ACCEPT_LANGUAGE
+ if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
+ foreach (explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']) as $part) {
+ $userLangs[] = strtolower(substr($part, 0, 2));
+ }
+ }
+
+ // 5th highest priority: COOKIE
+ if (isset($_COOKIE['lang'])) {
+ $userLangs[] = $_COOKIE['lang'];
+ }
+
+ // Lowest priority: fallback
+ $userLangs[] = $this->fallbackLang;
+
+ // remove duplicate elements
+ $userLangs = array_unique($userLangs);
+
+ // remove illegal userLangs
+ $userLangs2 = array();
+ foreach ($userLangs as $key => $value) {
+ // only allow a-z, A-Z and 0-9 and _ and -
+ if (preg_match('/^[a-zA-Z0-9_-]*$/', $value) === 1)
+ $userLangs2[$key] = $value;
+ }
+
+ return $userLangs2;
+ }
+
+ protected function getConfigFilename($langcode) {
+ return str_replace('{LANGUAGE}', $langcode, $this->filePath);
+ }
+
+ protected function load($filename) {
+ $ext = substr(strrchr($filename, '.'), 1);
+ switch ($ext) {
+ case 'properties':
+ case 'ini':
+ $config = parse_ini_file($filename, true);
+ break;
+ case 'yml':
+ case 'yaml':
+ $config = spyc_load_file($filename);
+ break;
+ case 'json':
+ $config = json_decode(file_get_contents($filename), true);
+ break;
+ default:
+ throw new InvalidArgumentException($ext . " is not a valid extension!");
+ }
+ return $config;
+ }
+
+ /**
+ * Recursively compile an associative array to PHP code.
+ */
+ protected function compile($config, $prefix = '') {
+ $code = '';
+ foreach ($config as $key => $value) {
+ if (is_array($value)) {
+ $code .= $this->compile($value, $prefix . $key . $this->sectionSeparator);
+ } else {
+ $fullName = $prefix . $key;
+ if (!preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/', $fullName)) {
+ throw new InvalidArgumentException(__CLASS__ . ": Cannot compile translation key " . $fullName . " because it is not a valid PHP identifier.");
+ }
+ $code .= 'const ' . $fullName . ' = \'' . str_replace('\'', '\\\'', $value) . "';\n";
+ }
+ }
+ return $code;
+ }
+
+ protected function fail_after_init() {
+ if ($this->isInitialized()) {
+ throw new BadMethodCallException('This ' . __CLASS__ . ' object is already initalized, so you can not change any settings.');
+ }
+ }
+}
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