Prepared By : Uday Shah (HOD - IT)
Contact No : 7600044051
E-Mail : rupareleducation@gmail.com
Web programming
using PHP
· Web programming
refers to the writing, markup and coding involved in Web development,
· Which includes
Web content, Web client and server scripting and network security. The most
common languages used for Web programming are XML, HTML, JavaScript, Perl 5 and
PHP. Web programming is different from just programming, which requires inter disciplinary
knowledge on the application area, client and server scripting, and database
technology.
Q-1: Explain Webpage:
· This Documents
are written in HTML (Hypertext Markup Language) and it is translated by Web
Browser.
· Web page is a web
document which consists of text, graphics and media. Web page is created with
html tags or any mark up language. It is suitable for any browser and word wide
web.
·
Web pages can
either be static or dynamic.
· The term webpage
is used when talking about scripting language, they have different extension
like .html, .htm etc.
·
Web browser
display a web page on a monitor or mobile device.
· A webpage is a
documents, typically written in plain text with formatting instructions of
Hypertext Markup Language.
Q-2: Explain Website:
·
A set of related WebPages
will create a website, the web pages are created could be accessed using
website from a simple uniform resource locator (URL), which is referred as web
addresses.
· Web site can be
categories as per requirement such categories include, education, social
networking, information, organization search engine etc.
Example of web sites is
·
www.google.com --> Which
is search engine
·
www.w3school.com --> Which
is education website
·
www.fridow.com --> Which
is social networking site.
Q-3: What is static website.
· Static website: A
website having static page & display the same information to all users is
called static website. Static website is made up with simple HTML.
· A static website
contains information that does not change. It remains the same, or static for
every viewer of the site.
· A static website
is one that has web pages stored on the server in the format that is sent to a
client web browser. It is primarily coded in HTML.
Advantages:
·
Quick to develop
·
Cheap to develop
·
Cheap to host.
Disadvantage:
·
=> Requires
web development expertise to update site
·
=> Site not as
useful for the user
·
=> content can
get static
Q-4: Explain Dynamic web.
·
A dynamic website
is one that changes or customizes itself frequently and automatically based on
certain criteria.
· A website that
have interaction with user and change information with each user is called
dynamic website. Dynamic website is made with HTML, DHTML, CSS Client side
scripting, server side scripting.
· A dynamic website
contains information that changes, depending on the viewer of the site, the
time of the day, the time zone, the native language of the country the viewer
is in or many other factors.
Advantages:
·
Much more
functional website
·
Much easier to
update
·
New content
brings people back to the site and helps in the search engines.
·
Can work as a
system to allow staff or users to collaborate.
Disadvantages:
·
Slower/ more
expensive
·
Hosting costs a
little more.
Q-5: Explain Scripting language.
· A scripting
language or script language is a programming language that supports the writing
of scripts, programs written for a special runtime environment that can
interpret and automate the execution of tasks which could be executed one by
one human operator.
·
There are two types of scripting language.
· Client Scripting Language: Client side scripting generally refers to the class
of computer programs on the web that are executed client side by the user’s web
browser.
· Client side
operations are performed on the visitors computer by the users internet browser
to display the web page as the data is received from the server.
· Client side
scripting is a script (javascript,VB script) that is executed by the browser
that resides at the user computer.
·
Server Scripting Language.
· Server side
scripting on the other hand used the language that can be understood by the
server only, the work of server is process the request which is send by the
client.
· After the compilation
of the process the server gives back the response the client.
· Server can
understand both the client side language as well as its own language.
· There are many
web servers which can understand the server side coding.
Q-5: Introduce to other server side
scripting language.
·
Various kind of
server language which help to process the client request.
1.PHP:
·
PHP stands for
hyper text preprocessor and earlier standard out as personal home page. PHP is
similar in many way to Asp as it is an interpreted scripting language.
· PHP as more of a
C / Javascript syntax then Asp standard VB script. PHP is open source software
developed by Rasmus Lerdorf.
2. ASP:
· ASP stands for
Active Server Pages. It is a technology built into IIS. ASP is more a platform
then a language. You can write ASP pages in VB script, javascript or even perl
or python.
· You can get start
with ASP by initially IIS in windows 2000 or in
windows 1998.
3. ASP.net:
· ASP.net is the
web part of Microsoft new .net frame work. It is different enough from ASP to
its own mechanism like cold fusion. ASP.net page is compiled on first execution
rather then interpreted.
4.Cold
fusion:
·
It is a tag base
language created by macromedia. It is run as a script server and interact with
the web server. The language is tag based that means it most of the interaction
is placed inside html style tags.
· Cold fusion
server runs on most platform, however licenses is not cheap. The first time you
run a cold fusion script the execution is compile so any of the execution are
very quick.
5.JSP:
· JSP is recognized
as Java Server Pages. It is a technology for creating dynamic web pages based
on html, xml or other types of document. It came into existence in 1999 by sun
micro system.
Q-6: Explain Web servers:
· A Web server can
be referred as hardware or software , which helps to delivered website content
to user with access of internet.
· The main
functionality of web server is the receiver the request send by the client in
html format, process the request and give back response to client.
·
There are
basically two types of web servers.
· IIS: IIS is
known as internet information services.
Which is http web server. IIS is a software application the creater is
Microsoft for use with Microsoft windows.
· It is supported
by Http, Https, FTP , Ftps and SMTP protocol. It is a part of windows server
family.
· Once the services
of IIS is on it can be accessed using Microsoft management console, a component
windows 2000. This web server is widely used when website is created using
Asp.net.
· Apache: As
we knows that there is a webserver requirement for PHP is apache.
· The name apache
derived from the word “Patchy” that the apache developer used to describe early
version of the software.
·
Apache is the
http web server , which is developed and maintain by apache software
foundation.
· It is available
for various operating systems like unix, linux, windows-xp etc.
·
Apache
applications are widely used on unix operating system.
·
It is characterized as a open source software like
PHP, Mysql etc…..
· Apache is the
application which understand the PHP, JSP etc. like language and is used to
process the code.
Q-7: Explain Web Hosting
· A web hosting
service is a kind of internet hosting service which allow organization
companies and individual to make their website live via the WWW.
· Web hosting
companies provide some space on owned or leased server to their clients. They
also provide data center space for other servers called collocation. Also known
as Housing in Latin America .
· The server for
web hosting is referred to as hardware with a very large space and
configuration.
· Most hosting
providers provide Linux based web hosting which offers a wide range of
different software. A typical configuration for a Linux server is the LAMP
platform Linux, Apache, MYSQL and PHP/Perl/Python.
·
There are
different types of hosting servers as under
·
Free web hosting
·
Shared web
hosting
·
Reseller web
hosting
·
virtual Dedicated
server
·
Dedicated Hosting
Service
Q-8: Explain Virtual Host
·
The term virtual
Host refers to running more than one web site on a single machine. Virtual host
can be “IP based” , it means that you have a different IP addresses for every
web site, or “name-based”, means that you have multiple names running on each
IP address.
· IP based virtual
host: For this type of configuration where more than one website referring the
server than runs Apache with different IP addresses, the physical server should
have respectively different IP address configuration.
· Name based
virtual host: In this configuration when apache web server receives a request,
it looks for the hostname in the HTTP header, and depending on the host name,
it serves different websites.
Q-9: Explain Multi Homing:
· Multi homing
describes a computer host that has multiple IP addresses to connect networks. A
multi home’s host is physically connected to multiple data links that can be on
the same or different networks.
· Using the stream
control Transmission Protocol(SCTP), multi homing allows a single SCTP to
support multiple IP addresses by which connection is more likely to survive a
network failure.
· Multi homing
means that redundant local area networks can be used to support local access.
Multi homing is commonly used in web management for load balancing, redundancy,
and disaster recovery.
Q-10: Explain Distributed Server
· Large networks
have multiple servers. The servers are often distributed around the network
with a server on every subnet. This improves booting efficiency. Implementation
distributed servers requires a technique for maintaining central control and coordinating
configuration information among the servers.
· The client-server
model is a distributed application structure in computing that partitions tasks
or workloads between the providers of a resources or service called servers and
service requesters called clients.
Q.11: Explain Document Root:
· The document root
informs where all PHP script runs from many pages scripted using PHP seem to
assume that the script is running under Apache. Execution of PHP possible with
IIS on a windows platform.
· Apache provides
an environment variable called DOCUMENT_ROOT while IIS does not. This variable
tells the code about where the web pages are delivered from and may have a
value something like this:
·
/usr/local/apache/share/htdocs
·
In Xampp control
panel it is
·
/xampp/htdocs
·
IIS and apache
tell the name and location of the currently executing script. That information
is in an environment variable called SCRIPT_NAME.
·
Explain PHP ini
(Initialization file)
· PHP.ini is a
configuration file that is used to customize behavior of PHP during run time.
The setting like uploading directory, registering global variables, display
errors, log errors, max uploading size setting, maximum time to execute a
script and such other configuration is written in this file. Ini means
Initialization file.
· When PHP server
starts up it looks for PHP.ini file first to load various values for setting.
If any changes in PHP.ini then you need to restart Apache server from xampp
control panel to check the changes is affected. The file is found at C:\xampp\php\php.ini
·
Explain PHP
htaccess
·
.htaccess is a
configuration file for use on web servers running the Apache web server
software. When an .htaccess file
· is placed in a
directory which is in turn ‘loaded via the Apache web server’, then the
.htaccess file is detected and executed by the Apache web server software.
HTACCESS file can be placed in the various directories of your web server to
provide specific handling of various Apache web server options for that
directory. Apache web servers have two main places for configuration
information are httpd config files and per-directory .htaccess files.
:: Best Of Luck ::
