/** * Attempt to detect the MIME type of a file using available extensions * * This method will try to detect the MIME type of a file. If the fileinfo * extension is available, it will be used. If not, the mime_magic * extension which is deprected but is still available in many PHP setups * will be tried. * * If neither extension is available, the default application/octet-stream * MIME type will be returned * * @param string $file File path * @return string MIME type */ protected function _detectFileMimeType($file) { $type = null; // First try with fileinfo functions if (function_exists('finfo_open')) { if (self::$_fileInfoDb === null) { self::$_fileInfoDb = @finfo_open(FILEINFO_MIME); } if (self::$_fileInfoDb) { $type = finfo_file(self::$_fileInfoDb, $file); } } elseif (function_exists('mime_content_type')) { $type = mime_content_type($file); } // Fallback to the default application/octet-stream if (!$type) { $type = 'application/octet-stream'; } return $type; }