Variables are used in PHP and other programming languages to store dynamic values.
Variables can be used in any PHP program to store information.
How to create or declare a variable in PHP?
Variables are declared using $ (dolar) sign followed by _ (underscore) or alphabets.
If we want to declare a variable named First Name we can write it as:
$firstName
A variable name can contain Alpha Numeric Characters with or without underscores.
A variable can store values of any data type like strings, bool, float, double or integer.
Remember that in PHP the variables are declared in the same line where a value is assigned to them.
Unlike other programming languages there is no need to firstly declare a variable and then assign a value to it.
You can assign values and declare a variable at the same time.
Here is an example:
<?php
$firstName = “Manish”;
?>
If we want to print this variable we can simply write
<?php
$firstName = “Manish”;
echo $firstName;
//Outputs : Manish
?>
Variables in PHP are case sensitive.
Note : In the example given above we have not used single quotes or double quotes while echoing or printing $firstName. But a string cannot be assigned to a variable without the use of double or single quotes.
Consider the example given below
<?php
$lang = “PHP”;
echo “We are studying $lang”;
//Outputs : We are studying PHP.
?>
In this example we have written $lang inside double quotes. We will not get any error because the assigned value to $lang variable was a string.
You can watch out Step by Step Tutorial About Variables in PHP
You can join out Php Training in Lucknow
