Here is an example of Adding text to an image
<?php
$image = imagecreate(200, 200);
$white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
$black = imagecolorallocate($image, 0x00, 0x00, 0x00);
imagefilledrectangle($image, 50, 50, 150, 150, $black);
imagestring($image, 5, 50, 160, "A Black Box", $black);
header("Content-Type: image/png");
imagepng($image);
?>
The imagestring() function adds text to an image. Specify the top-left point of the text, as well as the color and the font (by GD font identifier) to use: