How to place text over an image at particular position using codeigniter - codeigniter-3

Question

My project is an online exam using CodeIgniter. once a student completed an online exam, I need to display the marks on the mark sheet image. I need to display student name, student photo, register number, mark a particular position in an image.
I have tried to place text over an image using PHP using below function
imagettftext, image copy, imagecreatefromjpeg. in wamp server, it's working. when I copy the same program in xampp it shows a black background.
these function not working in CodeIgniter also. How to do this using CodeIgniter?
I have tried this in core PHP. It's working.
imagettftext($our_image, $size,$angle,$left5,$top5 , $white_color, $font_path, 'MSO');
imagettftext($our_image, $size,$angle,$left6,$top5, $white_color, $font_path, '100');
imagettftext($our_image, $size,$angle,$left7,$top5, $white_color, $font_path, '70');
imagettftext($our_image, $size,$angle,$left8,$top5, $white_color, $font_path, '70% A');
imagettftext($our_image, $size,$angle,$left6,$top6, $white_color, $font_path, '100');
imagettftext($our_image, $size,$angle,$left7,$top6, $white_color, $font_path, '70');
imagettftext($our_image, $size,$angle,$left8,$top6, $white_color, $font_path, '70% A');
imagettftext($our_image, $size,$angle,$left9,$top7, $white_color, $font_path, date('d/m/Y'));
$im2 = imagecreatefromjpeg("cmimage/studentphoto.jpg");
imagecopy($our_image,$im2,1900,1140,-80,-80,360,400);