PHP Tutorial / PDF

Table of Contents:

What is PHP?

Language Syntax

Embedding PHP Code .

Dynamic vs. Static Web pages

Variables

Strings

Arrays 

Conditionals and Looping Constructs

Array Traverse Constructs: 

Operators  

Functions  

File System Functions: 

Web Application Features

Working With Cookies

Built-in Variables 

PHP internal variables

CGI / Web server provided variables

HTTP Request Variables 

Regular Expressions . 

Regular Expression Functions in PHP .  

Database Handling 

Communication with MySQL

MySQL Example 

Communication with Other Databases

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Sample of the pdf document :

What is PHP?

PHP (recursive acronym for "PHP: Hypertext Preprocessor") is a widely-used Open Source general-purpose

scripting language that is especially suited for Web development and can be embedded into HTML.

How PHP came into being :

PHP started as a quick Perl hack written by Rasmus Lerdorf in late 1994. Over the next two to three years, it

evolved into what we today know as PHP/FI 2.0. PHP/FI started to get a lot of users, but things didn't start

flying until Zeev Suraski and Andi Gutmans suddenly came along with a new parser in the summer of 1997,

leading to PHP 3.0. PHP 3.0 defined the syntax and semantics used in both versions 3 and 4.

Why yet another language?

People often ask "why invent yet another language; don't we have enough of them out there"? It is simply a

matter of "the right tool for the right job". Many Web developers found that existing tools and languages were

not ideal for the specific task of embedding code in markup. Those developers collaborated to develop a

server-side scripting language which they felt would be ideal for developing dynamic Web-based sites and

applications.

PHP was created with these particular needs in mind. Moreover, PHP code was developed for embedment

within HTML. In doing so, it was hoped that benefits such as quicker response time, improved security, and

transparency to the end user would be achieved. PHP has evolved into a language, or maybe even an

environment, that has a very specific range of tasks in mind. For this, PHP is, in Stig's humble opinion, pretty

close to the ideal tool.....

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