Variables are “containers” for storing information.
Creating (Declaring) Variables
[sam id=”4″ codes=”true”]
In PHP, a variable starts with the $ sign, followed by the name of the variable:
[nextpage title=”Program” ]
[message_box color=”yellow”]
<html>
<body>
<?php
$txt=”Hello Engineers!!”;
$x=5;
$y=6.5;
echo $txt;
echo “<br>”;
echo $x;
echo “<br>”;
echo $y;
?>
</body>
</html>
[/message_box]
[/nextpage]
[nextpage title=”Output” ]
[message_box color=”yellow”]
Hello Engineers!!
5
6.5
[/message_box]
[/nextpage]
After the execution of the statements above, the variable $txt will hold the value Hello world!, the variable $x will hold the value 5, and the variable $y will hold the value 6.5.
Note:- when you assign text value to variable,puts quotes around the value
PHP Variables
A variables can have sort name (like x and y) or one more descriptive names (age,total,value).
Rules for PHP variables:
- A Variable start with $ sign followed by the name of the variable
- A Variable start with letter or underscore character
- A Variable can not start with a number
- A Variable can not contain alpha-numeric character and underscores (A-z ,0-9,and _ )
- Variable names are case sensative ($age and AGE are two different variable)
Remember that php variables names are case sensative !!!
