This code allows you to add text to an existing image file. It takes the text string to add, selects a font size, calculates the width and height of the text, loads the image, allocates colors for the background and text, positions the text on the image, and outputs the new image with the text overlaid. The text is drawn on the image from the bottom right corner.

1. Adding Text to an Image
< ?php
header ("Content-type: image/png");
$string = "your text";
// try changing this as well
$font = 4;
$width = imagefontwidth($font) * strlen($string) ;
$height = imagefontheight($font) ;
$im = imagecreatefrompng("/path/to/yourimagefile");
$x = imagesx($im) - $width ;
$y = imagesy($im) - $height;
$backgroundColor = imagecolorallocate ($im, 255, 255, 255);
$textColor = imagecolorallocate ($im, 0, 0,0);
imagestring ($im, $font, $x, $y, $string, $textColor);
imagepng($im);
?>