Create Transparent Image With String Using PHP GD – Laravel 8

             $im = imagecreatetruecolor(400, 100); 

            /*$white = imagecolorallocate($im, 255, 255, 255);
            //imagefilledrectangle($im, 0, 0, 399, 99, $white);
            $black = imagecolorallocate($im, 0, 0, 0);*/

            imagesavealpha($im, true);
            imagealphablending($im, false);
            $white = imagecolorallocatealpha($im, 255, 255, 255, 127);
            imagefill($im, 0, 0, $white);
            $black = imagecolorallocate($im, 0, 0, 0);

            imagettftext($im, 30, 0, 0, 60,  
                        $black,  
                        base_path('public/fonts/Dancing-Script.ttf'), 'Satish Sharma'); 
            
            // Output to browser 
            header('Content-Type: image/png');

            $file='zip-unzip/'.rand(10000, 9999999)."-signature.png";

            imagepng($im, $file);
            imagedestroy($im); 
            
            $base64 = 'data:image/png;base64,' . base64_encode(file_get_contents(base_path('public/'.$file)));       

            unlink(base_path('public/'.$file));