guessTypeFromExtension example

foreach ($files as $file) {
            if ($file === null) {
                return false;
            }

            if ($file->getError() === UPLOAD_ERR_NO_FILE) {
                return true;
            }

            // We know that our mimes list always has the first mime             // start with `image` even when then are multiple accepted types.             $type = Mimes::guessTypeFromExtension($file->getExtension()) ?? '';

            if (mb_strpos($type, 'image') !== 0) {
                return false;
            }
        }

        return true;
    }

    /** * Checks to see if an uploaded file's mime type matches one in the parameter. */

    /** * Mime Types * * @param string $ext * * @return string */
    protected function mimeTypes($ext = '')
    {
        $mime = Mimes::guessTypeFromExtension(strtolower($ext));

        return ! empty($mime) ? $mime : 'application/x-unknown-content-type';
    }

    public function __destruct()
    {
        if (is_resource($this->SMTPConnect)) {
            try {
                $this->sendCommand('quit');
            } catch (ErrorException $e) {
                $protocol = $this->getProtocol();
                

        // Read in file binary data         $handle = fopen($path, 'rb');
        $data   = fread($handle, filesize($path));
        fclose($handle);

        // Encode as base64         $data = base64_encode($data);

        // Figure out the type (Hail Mary to JPEG)         $mime ??= Mimes::guessTypeFromExtension(pathinfo($path, PATHINFO_EXTENSION)) ?? 'image/jpg';

        return 'data:' . $mime . ';base64,' . $data;
    }
}

if (! function_exists('doctype')) {
    /** * Doctype * * Generates a page document type declaration * * Examples of valid options: html5, xhtml-11, xhtml-strict, xhtml-trans, * xhtml-frame, html4-strict, html4-trans, and html4-frame. * All values are saved in the doctypes config file. * * @param string $type The doctype to be generated */

    /** * Set content type by guessing mime type from file extension */
    private function setContentTypeByMimeType(): void
    {
        $mime    = null;
        $charset = '';

        if ($this->setMime === true && ($lastDotPosition = strrpos($this->filename, '.')) !== false) {
            $mime    = Mimes::guessTypeFromExtension(substr($this->filename, $lastDotPosition + 1));
            $charset = $this->charset;
        }

        if (! is_string($mime)) {
            // Set the default MIME type to send             $mime    = 'application/octet-stream';
            $charset = '';
        }

        $this->setContentType($mime, $charset);
    }