PHP String Variables

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A string variable is used to manipulate any character stored in a variable you declared.

This chapter will discuss common function you can use to manipulate string variables.

Some common functions are:

  • The Concatenation Operator
  • The strlen() function
  • The strpos() function

The concatenation operator is very useful to combine two string values.

Example:

LulzSec Hacked Three Websites So Far: PBS.org, Sony Pictures and Infragard.net

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Just this May 2011, LulzSec hacked pbs.org followed by Sony Pictures. LulzSec or known as Lulz Security, a computer hacker group, hacked another website this month and stole 180 passwords from Infragard.net. Infragard.net is a program run by FBI to gain support through Information Technology. The aim of this program is to exchange information to FBI to crack down cyber terrorist. Infragard exist

PHP Variables

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A variable is used to store any value that you like.

You can reuse variable in any block of code in your PHP script.

PHP variables must start with a dollar ($) sign.

PHP Variable Syntax

$variable_name = value;

Below is an example of how to use variables in PHP:

PHP Syntax

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If you came from other programming languages like c/c++ and or Java, you will not have difficulty understanding PHP syntax as they have the same thing in common.

But unlike c/c++ or Java, PHP script is executed on the server and can be inserted within any HTML code and must start scripting block with <?php and end with ?>.

Below is an example of PHP file:

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