Learn About PHP Variables

Introduction

In my previous blog, I talked about a basic introduction to PHP.

In this blog, we will discuss "PHP VARIABLES".

What is Variable?

Variables are used to store the value and access the stored value in the program.

In PHP, variables begin with the "$" symbol, followed by the Variable name.

Example:

Rules for assigning a Variables:

Basically, a Variable can have a short name (like i,e., x,y,etc..) or larger names (like i,e., first,age_group,etc..),

A Variable name must start with underscore characters or with a letter.
A Variable name cannot begin with numbers.
A variable name can contain only alpha-numeric characters and underscores ( A-Z, 0-9 and _ ).
Variable names are case-senstive($NAME, $name), these names are two different variable names.

PHP OUTPUT VARIABLES

Example 1

Example 2

Global Variable

Example 1

The global variables are accessed from inside of the function with the help of the keyword "global".
Use the "global" keyword before the declared function variable (inside).

Example 2

Local Variable

A variable declared inside of the function is known as local variable.
It can be accessed only inside that function.
The local variables can have the same names with different functions because they can be recognized only by their declared function names.

Example:

Static Variable

Generally,when the function gets executed,all the variables in the function are deleted.
Sometimes, we want some of the local variables for further references.
For that purpose, use the "static" keyword before the variable in the function declaration.

Example

These are all the PHP Variables.

Here, I have attached the example codings for the above-discussed topics. Kindly refer to it.

Thank you!.