<?php class Template { static $blocks = array(); static $cache_path = 'cache/'; static $cache_enabled = TRUE; static function view($file, $data = array()) { $cached_file = self::cache($file); extract($data, EXTR_SKIP); require $cached_file; } static function cache($file) { if (!file_exists(self::$cache_path)) { mkdir(self::$cache_path, 0744); } $cached_file = self::$cache_path . str_replace(array('/', '.html'), array('_', ''), $file . '.php'); if (!self::$cache_enabled || !file_exists($cached_file) || filemtime($cached_file) < filemtime($file)) { $code = self::includeFiles($file); $code = self::compileCode($code); file_put_contents($cached_file, '<?php class_exists(\'' . __CLASS__ . '\') or exit; ?>' . PHP_EOL . $code); } return $cached_file; } static function clearCache() { foreach(glob(self::$cache_path . '*') as $file) { unlink($file); } } static function compileCode($code) { $code = self::compileBlock($code); $code = self::compileYield($code); $code = self::compileEscapedEchos($code); $code = self::compileEchos($code); $code = self::compilePHP($code); return $code; } static function includeFiles($file) { $code = file_get_contents($file); preg_match_all('/{% ?(extends|include) ?\'?(.*?)\'? ?%}/i', $code, $matches, PREG_SET_ORDER); foreach ($matches as $value) { $code = str_replace($value[0], self::includeFiles($value[2]), $code); } $code = preg_replace('/{% ?(extends|include) ?\'?(.*?)\'? ?%}/i', '', $code); return $code; } static function compilePHP($code) { return preg_replace('~\{%\s*(.+?)\s*\%}~is', '<?php $1 ?>', $code); } static function compileEchos($code) { return preg_replace('~\{{\s*(.+?)\s*\}}~is', '<?php echo $1 ?>', $code); } static function compileEscapedEchos($code) { return preg_replace('~\{{{\s*(.+?)\s*\}}}~is', '<?php echo htmlentities($1, ENT_QUOTES, \'UTF-8\') ?>', $code); } static function compileBlock($code) { preg_match_all('/{% ?block ?(.*?) ?%}(.*?){% ?endblock ?%}/is', $code, $matches, PREG_SET_ORDER); foreach ($matches as $value) { if (!array_key_exists($value[1], self::$blocks)) self::$blocks[$value[1]] = ''; if (strpos($value[2], '@parent') === false) { self::$blocks[$value[1]] = $value[2]; } else { self::$blocks[$value[1]] = str_replace('@parent', self::$blocks[$value[1]], $value[2]); } $code = str_replace($value[0], '', $code); } return $code; } static function compileYield($code) { foreach(self::$blocks as $block => $value) { $code = preg_replace('/{% ?yield ?' . $block . ' ?%}/', $value, $code); } $code = preg_replace('/{% ?yield ?(.*?) ?%}/i', '', $code); return $code; } } ?>