PHP Basics

Friday, 7 August 2015

PHP Variables :-

Variables are like "containers" for storing information.

In PHP, a variable starts with the"$" sign, followed by the name of the variable.

Some Points to be remembered :-

A variable name must start with a letter or the underscore character.
A variable name,declared in PHP, cannot start with a number.
A variable name can only contain alpha-numeric characters & underscores(a-z, A-Z, 0-9 and etc).
Variable names are case-sensitive. ($name and $NAME are totally different in PHP).

A sample example to illustrate the concept of PHP variable :-

variable.php:-

<!DOCTYPE html>

<html>

<?php

$a = "Hi Everyone"; //Assigning String Value

$b = 1; //Assigning Integer Value

$c = 20.5; //Assigning Float Value

echo $a;

echo "<br>";

echo $b;

echo "<br>";

echo $c;

</body>

</html>

Screenshot:-

Here, "<br>" tag is used to display the text in the next line.

PHP statements end with a semicolon ";".

Friday, 7 August 2015