Php tutorial by cyber security infotech(csi). Cs-infotech is one of the best cyber security and website development company in India. we also provide Network security, software development, Cyber security corporate training and SEO and SMO services. Our services are Employee Monitoring System,Employee Monitoring Software,Website Audit,Network Security,Network Audit and Information Security.

1. PHP TUTORIAL BY CYBER
SECURITY INFOTECH (CSI)
http://www.csinfotech.org/

2. About the company :
 Cs-infotech is one of the best cyber security and website
development company in India. we also provide Network
security, software development, Cyber security
corporate training and SEO and SMO services.
 Our services are Employee Monitoring System,
Employee Monitoring Software, Website Audit , Network
Security , Network Audit and Information Security.

3. Agenda
 Introduction
 PHP Language Basics
 Built-in Functions
 PHP on Linux and Windows
 Tricks and Tips
 PHP 5
 Examples
 Questions?

4. Introduction
 What is PHP?
 PHP stands for "PHP Hypertext Preprocessor”
 An embedded scripting language for HTML like
ASP or JSP
 A language that combines elements of Perl, C,
and Java

5. Introduction
 History of PHP
 Created by Rasmus Lerdorf in 1995 for tracking
access to his resume
 Originally a set of Perl scripts known as the
“Personal Home Page” tools
 Rewritten in C with database functionality
 Added a forms interpreter and released as
PHP/FI: includes Perl-like variables, and HTML
embedded syntax

6. Introduction
 History of PHP (cont.)
 Rewritten again in and released as version 2.0 in
November of 1997
 Estimated user base in 1997 is several thousand
users and 50,000 web sites served
 Rewritten again in late 1997 by Andi Gutmans
and Zeev Suraski
 More functionality added, database support,
protocols and APIs

7. Introduction
 History of PHP (cont.)
 User base in 1998 estimated 10,000 users and
100,000 web sites installed
 Version 3.0 was released in June 1998 as PHP
 Estimated user base in tens of thousands and
hundreds of thousands of web sites served

8. Introduction
 History of PHP (cont.)
 Rewritten again in 1997 by Andi Gutmans and
Zeev Suraski
 More functionality added (OOP features),
database support, protocols and APIs
 PHP 3.0 is released in June 1998 with some OO
capability
 The core is rewritten in 1998 for improved
performance of complex applications

9. Introduction
 History of PHP (cont.)
 The core is rewritten in 1998 by Zeev and Andi
and dubbed the “Zend Engine”
 The engine is introduced in mid 1999 and is
released with version 4.0 in May of 2000
 The estimated user base is hundreds of
thousands of developers and several million of
web sites served

10. Introduction
 History of PHP (cont.)
 Version 5.0 will include version 2.0 of the Zend
Engine
 New object model is more powerful and intuitive
 Objects will no longer be passed by value; they now
will be passed by reference
 Increases performance and makes OOP more
attractive

11. Introduction
 Netcraft Statistics
 11,869,645 Domains, 1,316,288 IP Addresses

12. Introduction
 Performance*
 Zdnet Statistics
 PHP pumped out about 47 pages/second
 Microsoft ASP pumped out about 43 pages/second
 Allaire ColdFusion pumped out about 29
pages/second
 Sun Java JSP pumped out about 13 pages/second

13. PHP Language Basics
 The Script Tags
 All PHP code is contained in one of several script
tags:
 <?
// Some code
?>
 <?php
// Some code here
?>

14. PHP Language Basics
 The Script Tags (cont.)
 <script language=“PHP">
// Some code here
</script>
 ASP-style tags
 Introduced in 3.0; may be removed in the future
 <%
// Some code here
%>

15. PHP Language Basics
 The Script Tags (cont.)
 “Echo” Tags
 <table>
<tr>
<td>Name:</td><td><?= $name ?></td>
</tr>
<tr>
<td>Address:</td><td><?= $address ?></td>
</tr>
</table>

16. PHP Language Basics
 Hello World!: An Example
 Like Perl, there is more than one way to do it
 <?php echo “Hello World!”; ?>
 <?php
$greeting = “Hello World!”
printf(“%s”, $greeting);
php?>

17. PHP Language Basics
 Hello World!: An Example (cont.)
 <script language=“PHP”>
$hello = “Hello”;
$world = “World!”;
print $hello . $world
</script>

18. PHP Language Basics
 Constants, Data Types and Variables
 Constants define a string or numeric value
 Constants do not begin with a dollar sign
 Examples:
 define(“COMPANY”, “Acme Enterprises”);
 define(“YELLOW”, “#FFFF00”);
 define(“PI”, 3.14);
 define(“NL”, “<br>n”);

19. PHP Language Basics
 Constants, Data Types and Variables
 Using a constant
 print(“Company name: “ . COMPANY . NL);

20. PHP Language Basics
 Constants, Data Types and Variables
 Data types
 Integers, doubles and strings
 isValid = true; // Boolean
 25 // Integer
 3.14 // Double
 ‘Four’ // String
 “Total value” // Another string

21. PHP Language Basics
 Constants, Data Types and Variables
 Data types
 Strings and type conversion
 $street = 123;
 $street = $street . “ Main Street”;
 $city = ‘Naperville’;
$state = ‘IL’;
 $address = $street;
 $address = $address . NL . “$city, $state”;
 $number = $address + 1; // $number equals 124

22. PHP Language Basics
 Constants, Data Types and Variables
 Data types
 Arrays
 Perl-like syntax
 $arr = array("foo" => "bar", 12 => true);
 same as
 $arr[“foo”] = “bar”;
 $arr[12] = true;

23. PHP Language Basics
 Constants, Data Types and Variables
 Arrays (cont.)
 <?php
$arr = array("somearray" => array(6 => 5, 13 => 9,
"a" => 42));
echo $arr["somearray"][6]; // 5
echo $arr["somearray"][13]; // 9
echo $arr["somearray"]["a"]; // 42
?>

24. PHP Language Basics
 Constants, Data Types and Variables
 Objects
 Currently not much more advanced than than associative
arrays Using constants
 Before version 5.0, objects are passed by value
 Slow
 Functions can not easily change object variables

25. PHP Language Basics
 Constants, Data Types and Variables
 Operators
 Contains all of the operators like in C and Perl (even the
ternary)
 Statements
 if, if/elseif
 Switch/case
 for, while, and do/while loops
 Include and require statements for code reuse

26. Built-in Functions
 What comes In the box?
 Array Manipulator Functions
 sort, merge, push, pop, slice, splice, keys, count
 CCVS: Interface to Red Hat’s credit system
 COM functions: Interface to Windows COM
objects
 Date and Time Functions
 getdate, mkdate, date, gettimeofday, localtime,
strtotime, time

27. Built-in Functions
 What comes In the box?
 Directory Functions
 Platform independent
 Error Handling Functions
 Recover from warnings and errors
 Filesystem Functions
 Access flat files
 Check directory, link, and file status information
 Copy, delete, and rename files

28. Built-in Functions
 What comes In the box?
 IMAP Functions
 Manipulate mail boxes via the IMAP protocol
 LDAP Functions
 Works with most LDAP servers
 Mail Functions
 mail($recipient, $subject, $message)

29. Built-in Functions
 What comes In the box?
 Database Functions
 dba: dbm-style abstraction layer
 dBase
 Frontbase
 Informix
 Ingres II
 Interbase
 mSQL

30. Built-in Functions
 What comes In the box?
 Database Functions (cont.)
 MySQL
 Oracle
 PostgreSQL
 SQL Server
 MING
 Macromedia Flash
 PDF
 Create/manipulate PDF files dynamically

31. Built-in Functions
 What comes In the box?
 POSIX Functions
 Manipulate process information
 Regular Expression Functions
 Uses POSIX regex
 Semaphore and Socket Functions
 Available only on Unix
 Session Management Functions

32. PHP on Linux and Windows
 Code Portability
 The obvious: don’t use Unix or Windows specific
functions
 Create a reusable module for file system
differences, for example:
 if( PHP_OS == "Linux" )
{
$ConfigPath = "/var/www/conf";
$DataPath = "/var/www/data";
}

33. PHP on Linux and Windows
 Code Portability
 if( ereg("WIN", PHP_OS) )
{
$ApachePath = “C:/Program Files/Apache
Group/Apache”;
$ConfigPath = ”$ApachePath/htdocs/conf";
$DataPath = "$ApachePath/htdocs/data";
}
$ConfigFile = "$ConfigPath/paperwork.conf";
$CountryList = "$DataPath/countries.txt";
$StateAbbrList = "$DataPath/usstateabbrs.txt";
$StateNameList = "$DataPath/usstatenames.txt";

34. Tricks and Tips
 Coding
 Prototype your web pages first
 Separate the design of the site from the coding
 Turn repetitive code into functions
 Makes for more maintainable and reusable code
 Turn grunt code into functions
 Database access, configuration file access

35. Tricks and Tips
 Debugging
 Feature: PHP is not a strongly typed language
 Variables can be created anywhere in your code
 Undocumented Feature: PHP is not a strongly
typed language
 Typos in variable names will cause stuff to happen

36. Tricks and Tips
 Debugging
 Use scripts to dump form and session variables
 Write scripts to dump data to discover bad or missing
data

37. Tricks and Tips
 Development Tools
 Color coding editors
 vim, Emacs, Visual SlickEdit
 IDEs
 Windows
 Macromedia Dreamweaver
 Allaire Homesite
 Zend’s PHPEdit
 Linux
 ???

38. PHP 5
 Release Date
 ???
 Features
 Complete objects
 Objects with constructors
 Abstract classes
 Private, protected and abstract functions
 Private, protected and constant variables
 Namespaces
 Exception handling with try/catch blocks

39. Resources
 PHP Downloads and Online Documentation
 www.php.net
 Community
 www.phpbuilder.com: articles on PHP, discussion forums
 www.phpresourceindex.com: over 1,000 PHP scripts
 www.phpvolcano.com: PHP 5 information
 Newsgroups
 comp.lang.php

40. Thank you …