Unable to render text properly Kannada(Indian language) to Image using PHP

Question

Here is my php code

$text = 'ಕನ್ನಡ';
$txt_color1 = 'red';
imagettftext($handle, 30, 0, 25, 60, $txt_color1, 'fonts\akshar.ttf', $text);

It results: enter image description here

*I tried available fonts(kannada) but I'm getting same result.