Chapter 1 Introduction to PHP




Contributed By:: Shehrevar Davierwala


What is PHP ?

PHP is probably the most popular scripting language on the web. It is used to enhance web pages.

PHP is a program that gets installed on top of your web server software like Apache,Microsoft IIS and other server software packages.

PHP is a scripting language, like HTML. That means that code does not need to be compiled before it gets used — it gets processed on the fly as necessary.


Why PHP ?

PHP is used to enhance web pages. With PHP, you can do things like create username and password login pages, check details from a form, create forums, picture galleries, surveys, and a whole lot more. If you’ve come across a web page that ends in PHP, then the author has written some programming code to liven up the plain, old HTML.

PHP is a server side scripting language that is embedded in HTML. It is used to manage dynamic content, databases, session tracking, even build entire e-commerce sites.

It is integrated with a number of popular databases, including MySQL, PostgreSQL, Oracle, Sybase, Informix, and Microsoft SQL Server.

PHP supports a large number of major protocols such as POP3, IMAP, and LDAP.

You add, delete, modify elements within your database thru PHP.

Using PHP, you can restrict users to access some pages of your website.

PHP performs system functions, i.e. from files on a system it can create, open, read, write, and close them.

What is full form of PHP ?

The most popular explanation of just what PHP stands for is “Hypertext Pre-processor”.But that would make it HPP 😉

An alternative explanation is that the initials come from the earliest version of the program, which was called Personal Home Page Tools. At least you get the letters “PHP” in the right order!

What is history of PHP ?

PHP started out as a small open source project that evolved as more and more people found out how useful it was. Rasmus Lerdorf unleashed the first version of PHP way back in 1994.

Should i learn PHP ?

PHP is so popular that if you’re looking for a career in the web design/web scripting industry then you just have to know it!

What are common characteristics of PHP ?

Five important characteristics make PHP’s practical nature possible −

  • Simplicity
  • Efficiency
  • Security
  • Flexibility
  • Familiarity


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