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
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Ankit Srivastava is an IT trainer, technology educator, and digital skills mentor with expertise in programming, data analytics, AI, and software development. He has successfully trained thousands of learners, with more than 10,000 student enrollments on Udemy. His practical teaching approach empowers students and professionals to build in-demand technical skills. Colorstech channel where Ankit posts video tutorials has more than 8000 Subscribers.
