At its most basic level, the Internet involves a simple request and response between the user’s computer (the client-side) and the remote website (the server-side),For instance I defined PHP server side language because the codes are executed in the server. There are other server-side languages such as Java Server Page (JSP), ASP.NET just to mention a few but PHP is about the most popular having been installed in over 20 million domains.PHP was created sometime in 1994 by Rasmus Lerdorf. During mid 1997, PHP development entered the hands of other contributors. Two of them, Zeev Suraski and Andi Gutmans, rewrote the parser from scratch to create PHP version 3 (PHP3).
PHP is a server-side scripting language that processes and generates HTML codes in response to client’s request.PHP’s origin dates back to 1995 when an independent software development contractor named Rasmus Lerdorf developed a Perl/CGI script that enabled him to know how many visitors were reading his online résumé. His script performed two tasks: logging visitor information, and displaying the count of visitors to the web page. Because the Web at the time was still a fledgling technology, tools such as these were nonexistent. Thus, Lerdorf’s script generated quite a bit of interest. Lerdorf began giving away his toolset, dubbed Personal Home Page (PHP).