Concepts of Graphics in PHP

Mixture of graphics and text methods are generally used in all kind of outputs.Such a way a standard web page contains text and graphics created through a series of HTTP requests from the web browsing pages. And each answered by a response from the web server. Each response contain one and only one type of data, and each kind of image requires a separate HTTP request and web server response like scripting mode. It form like the following way�.
<img src=�graph1.php� alt=�picture1�>
<img src=�graph2.php� alt=�picture 2�>