unitI-Introduction to php.pptx

G. S. Mandal’s
MIT CIDCO, Aurangabad
Prepared by: Asst. Prof. Neha A. Sahuji
UNIT-I

Contents
 What is PHP
 Why PHP?
 Evolution of PHP
 Popular PHP sites

 PHP is the abbreviation of Hypertext
Preprocessor.
 Earlier it was abbreviated as Personal
Home Page.
 PHP is the most popular and widely
used server side scripting language for
web development.

? Why PHP is called
Hypertext
Preprocessor?
? What does it mean by
Scripting Language?

• PHP is called hypertext preprocessor
because PHP libraries are already
compiled and processed.
• When any person request any PHP page
in browser address bar that request first go
to server.
• For example Apache is running on that
server then server interpret PHP files and
return back response in form of HTML.

 In simple terms, programming
languages are set of instructions or
code which tells a computer what it
needs to do.
 So basically, we provide a logic or
instruction to the computer to perform
some task to get the desired output
from it.
 When we need to write a CD or burn a
CD or when we need to paste
something in pen drive these all
instruction is given through some

 As the name suggest, it’s all about giving the script
to perform some certain task.
 Scripting languages are basically the subcategory
of programming languages which is used to give
guidance to another program or we can say to
control another program,
 So it also involves instructions. It basically connects
one language to one another languages and
doesn’t work standalone.
 Javascript, PHP, Perl, Python, VBScript these all
are the examples of scripting language.
 Scripting languages need to be interpreted
(Scanning the code line by line, not like compiler in
one go) instead of compiled.

 Markup languages are completely different from
programming languages and scripting languages.
 Markup languages prepare a structure for the
data or prepare the look or design of a page.
 These are presentational languages and it
doesn’t include any kind of logic or algorithm, for
example, HTML.
 HTML is not asking any kind of question to the
computer or it’s not comparing things and it’s not
asking any logical question. It’s just used to
represent a view inside a web browser.

 PHP files can contain text, HTML,
JavaScript code, and PHP code.
 PHP code is executed on the server,
and the result is returned to the
browser as plain HTML.
 PHP files have a default file
extension of ".PHP"

 PHP can generate the dynamic page
content.
 PHP can create, open, read, write, and close
files on the server.
 PHP can collect form data.
 PHP can send and receive cookies.
 PHP can add, delete, modify data in your
database.
 PHP can restrict users to access some
pages on your website.
 PHP can encrypt data.
 With PHP you are not limited to output

 PHP is open source and free.
 Short learning curve compared to other
languages such as JSP, ASP etc.
 Large community document
 Most web hosting servers support PHP by
default unlike other languages such as ASP
that need IIS. This makes PHP a cost
effective choice.
 PHP is regular updated to keep abreast with

 PHP has in built support for working hand
in hand with MySQL; this doesn’t mean you
can’t use PHP with other database
management systems. You can still use
PHP with
Postgres
Oracle
MS SQL Server
ODBC etc.
 PHP is cross platform; this means you can
deploy your application on a number of

 PHP or Hypertext Preprocessor was developed
by an employed Danish programmer, Rasmus
Lerdorf out of Toronto in Canada in 1994.
 Released to the public in 1995 with the name
Personal Home Page tools.
 It was then rewritten in 1996 by Zeev Suraski
and Andi Gutman who launched it as PHP3.
 In 2000, PHP4 was released incorporated into
a scripting engine followed by 3 more major-
version and few subversions until the latest
version PHP7.0 was released in 2015.
 It gained popularity over the years owing to it
being open source and allowing other
programmers to use the language on their own

unitI-Introduction to php.pptx

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