What is Gd PHP?

GD is an open source library for creating dynamic images.

• PHP uses GD library to create PNG, JPEG and GIF images.
• It is also used for creating charts and graphics on the fly.
• GD library requires an ANSI C compiler to run.

Sample code to generate an image in PHP

<?php
	header("Content-type: image/png");

	$string = $_GET['text'];
	$im = imagecreatefrompng("images/button1.png");
	$mongo = imagecolorallocate($im, 220, 210, 60);
	$px = (imagesx($im) - 7.5 * strlen($string)) / 2;
	imagestring($im, 3, $px, 9, $string, $mongo);
	imagepng($im);

	imagedestroy($im);
?>