* Path to the file. *

* @return bool true if the filename exists and is a regular file, false */ function is_file ($filename); /** * Detect MIME Content-type for a file * @link https://php.net/manual/en/function.mime-content-type.php * @param string $filename

* Path to the tested file. *

* @return string the content type in MIME format, like * text/plain or application/octet-stream. */ function mime_content_type ($filename); }