PHP Variables

A variable is used to store the information. In php variable is declare by $ symbol.

Variables in PHP

• Variables are used for storing a values, like text string, numbers or arrays.
• When a variable is declare, it can be used over and over again in your scripts.
• Variable does not need to be declare before adding a value to it.
• In a strongly typed programing language, you have to declare the type and name of the variable before using it.
• The correct way of declaring a variable in PHP:

$var_name = value;

• New php programs often forget the $ sign at the beginning of the variable.In that case it will not work.
• Let’s try creating a variable containing a string, and a variable containing a number:

<?php$txt=”Hello World”;$x=16;?>

<?php $x=4; $y=20;function calci() { $[‘y’]=$[‘x’]*$[‘y’]; }calci(); echo $y; // outputs 80 ?>