PHP Variables
by Lalita 24-Nov-15
282 0 942
PHP Variables is very interesting, its just like a container. PHP Variables data transfer from one place to another place. PHP Variables start with $ sign.
Basic Example:
<?php
$a= 20;
echo $a;
?>
Result: 20
There are two types of Variables :
1. Predefined Variable 2. User define Variables
1) Predefined Variables : These variables are available in PHP program. There is no need to declare and define these variable in the program. These are following type of Predefined Variable.
Predefined Variables = Super define variables.
$_GET
$_POST
$_COOKIE
$_SESSION
$_FILES
$_ENV
$_REQUEST
$_SERVER
2) User define Variable : This variable is declare and define by developers
For Example:
$ontime=50;
$ontime is a variable and 50 is a data and this data store in variable $num. So we can use this variable for print the value of 50 at any where as per requirement.
Benefit of PHP Variable: PHP automatically converts the variable to correct data type, depending on value.
Example:
<?php $a=30; $b=50; $c=$a+$b; echo "First Number is $a"."<br>"; echo "Second Number is $b"."<br>"; echo "Result is $c"; ?>
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