Prepared By : Uday Shah (HOD-IT)
E-Mail : rupareleducation@gmail.com
Contact No : 7600044051
Web Programming Using PHP - Unit 1
Static Web pages:
·
Static Web pages
are very simple.
·
It is written in
languages such as HTML, JavaScript, CSS, etc.
· For static web
pages when a server receives a request for a web page, then the server sends
the response to the client without doing any additional process.
· And these web
pages are seen through a web browser.
· In static web
pages, Pages will remain the same until someone changes it manually.
· Static web page
does not require more sever resources.
Dynamic Web
Pages:
·
Dynamic Web Pages are
written in languages such as PHP, AJAX, ASP, ASP.NET, etc.
·
In dynamic web pages,
the Content of pages is different for different visitors.
·
It takes more time to
load than the static web page.
· Dynamic web pages are
used where the information is changed frequently, for example, stock prices,
weather information, etc.
·
Dynamic page totally
depended on server response.
Client-side Scripting
·
The client-side environment used to run scripts is usually in a
browser.
·
The processing takes place on the end users computer.
·
The source code is transferred from the web server to the user’s
computer over the internet and run directly in the browser.
·
The scripting language needs to be enabled on the client
computer.
·
Sometimes if a user is conscious of security risks they may
switch the scripting facility off.
·
When this is the case a message usually pops up to alert the
user when script is attempting to run.
Server-side Scripting
· A server is a computer system that serves as a central
repository of data and programs and is shared by clients
·
The server-side environment that runs a scripting language is a
web server.
·
A user's request is fulfilled by running a script directly on
the web server to generate dynamic HTML pages.
·
This HTML is then sent to the client browser.
·
It is usually used to provide interactive web sites that
interface to databases or other data stores on the server.
· This is different from client-side scripting where scripts are
run by the viewing web browser, usually in JavaScript.
· The primary advantage to server-side scripting is the ability to
highly customize the response based on the user's requirements, access rights,
or queries into data stores.
Introduction to other server
side language.
·
Server side web
development uses specific tools and frameworks to build dynamic programs that
generate dynamic web sites.
·
It is designed such
that user requests are run on the primary server.
·
It provides an
interface to users to make requests, give instructions to the server to
process.
·
Server side coding is
also responsible for user authentication, and data security.
·
Using Server Side Languages we can explore the requirements of server side scripting and web development
technologies.
·
If you are looking for
an easy way to become a back-end web developer, do an online course on web
development.
·
Our tutors are
well-prepared to handle Full Stack offline courses as well according
to the requirement.
·
Server side technology
are a set of tools and programming languages that are used to design, build and
maintain server side operations of a web application.
·
Following are some list
of Server Side Languages.
JavaScript: This is a programming language that is considered to be a
building block of web development. This is one language that is used for both
front and back end applications. It has promoted the JavaScript everywhere
paradigm. JavaScript is a popular language and is easy to learn.
Python: Python is the latest trending programming language for back
end development. It is easy to use and is open source. It emphasizes on
readability and has an object oriented approach. It is used to write code for
small as well as large projects.
Ruby: Ruby is a dynamically typed programming language. It is an
object oriented language. It serves as a foundation for domain specific
languages. It can be implemented across all platforms.
Java: Java is similar to JavaScript. It is not a purely object
oriented programming language. It is designed to have minimum amount of
implementation dependencies.
PHP: Hypertext preprocessor language popularly known as PHP is an
open source language. It is suitable for back-end web development. It can also
be embedded into HTML.
Webserver
·
Web server refer to
just the software not the enter computer system.
·
It is responsible to
manage server side scripting.
·
It is also responsible
for client request and server response.
·
It is web server
software.
·
It provides function
such as database searching and e-commerce.
·
There is mostly two
used web server.
·
IIS Server
· Apache Server
IIS
Server:
·
IIS means Internet information
Service Microsoft web server. IIS runs under the server version of NT and 2000.
·
IIS is set of Internet
based service for Windows machine originally supplied as part of the option
Pack for Windows NT,
·
At present windows 10 version of IIS 6.0 and includes server for FTP, SMTP, NNTP and HTTP/HTTPS
etc...
Apache
Server
·
Apache is the most
widely used web server software.
·
Developed and
maintained by Apache Software Foundation, Apache is an open source software
available for free. It runs on 67% of all web servers in the world.
·
It is fast, reliable,
and secure.
·
It can be highly
customized to meet the needs of many different environments by using extensions
and modules.
·
Most WordPress hosting
providers use Apache as their web server software.
Web Hosting
·
Web Hosting is a
service that provides internet users with online systems for storing
information, image, video or any content accessible using the Web.
·
Web hosting are company
that provide space on a server that own for use by their client as well as
providing Internet connectivity, typically in a data center.
·
Hosting can be
categories in following general category that is
·
Free Hosting
·
Shared Hosting
·
Reseller Hosting
·
Virtual Private Server
Hosing
·
Dedicated Hosting
·
Collocated Hosting
· Application Hosting
Virtual Hosting
·
Virtual Hosting is a
method that web server use to host more than one domain name on the same
computer and IP address.
·
On the Internet,
virtual hosting is the provision of Web server hosting services so that a company or individual doesn't have
to purchase and maintain its own Web server and connections to the Internet.
·
A virtual hosting
provider is sometimes called a Web or Internet "space provider." Some
companies providing this service simply call it "hosting."
·
The main advantages of
virtual hosting is that it is cheapest way of Web Hosting for Small
Websites.
·
Apache was one of the
first server to support IP-based virtual hosting.
·
There are generally two
types of Apache virtual host configuration
·
IP Based Virtual Host
·
Name Based Virtual Host
Distributed
Web Server Overview
·
Web server is a
computer where the web content is stored.
·
Basically web server is
used to host the web sites but there exists other web servers also such as
gaming, storage, FTP, email etc.
·
A Web server is a program that uses HTTP (Hypertext Transfer Protocol) to serve the files in the
form of web pages.
·
When client sends
request for a web page, the web server search for the requested page if
requested page is found then it will send it to client with an HTTP response.
·
If the requested web
page is not found, web server will the send an HTTP response: Error 404
Not found.
· If client has requested
for some other resources then the web server will contact to the application
server and data store to construct the HTTP response.
· Dedicated computers and
appliances may be referred to as Web servers as well.
· The process is an
example of the client/server model.
·
All computers that host
Web sites must have Web server programs.
