Create Dynamic Images with Text Using PHP GD

First check weather php gd library is enabled.

<?PHP

echo '<pre>';

print_r(gd_info());

echo '</pre>';

?>

If you get a error or a blank page that means the gd is not enabled in your server.
Contact your hosting and ask for php gd to be enabled.

Try following coding, everything is commented.

<?PHP

//save the arial.ttf font file in the same folder
$font = 'arial.ttf';  
$fontsize = 10;
  
$YourText = 'Hi This Work';
$Text_Box = imagettfbbox($fontsize, 0, $font, $YourText);

//create image width 250, height 100
$image = imagecreatetruecolor(250,100);  

//0,0,0 is black
$bgcolor = imagecolorallocate($image, 0, 0, 0);
//255, 255, 255 is white
$fontcolor = imagecolorallocate($image, 255, 255, 255);

//create a rectangle with the back ground coloe
imagefilledrectangle($image, 0, 0, 250, 100, $bgcolor);

$x = 10;   
$y = 20;
//draw text on image
imagettftext($image, $fontsize, 0, $x, $y, $fontcolor, $font, $YourText); 

//setting png headers
header('Content-type: image/png');
//create png image
imagepng($image);
//delete tempory files
imagedestroy($image);

?> 

You can use this php file in a html file like this also

<img src="your_file_name.php" />