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.
<?php $a= 20; echo $a; ?>
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.
2) User define Variable: This variable is declare and define by developers
$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.
<?php $a=30; $b=50; $c=$a+$b; echo "First Number is $a"."<br>"; echo "Second Number is $b"."<br>"; echo "Result is $c"; ?>
First Number is 30
Second Number is 50
Result is 80