Variables in PHP

In PHP, there are a few different ways to write variables.

The most common way to write a variable is by using the dollar sign $ followed by the name of the variable. For example:

$name = "John";
$age = 30;
$is_admin = true;

Variable names in PHP can start with a letter or an underscore, but they cannot start with a number. Variable names are case-sensitive, so $name and $NAME are considered to be two different variables.

It’s also possible to define variables using the define() function. This function allows you to define a constant, which is a variable that cannot be changed once it has been set. For example:

define("MAX_USERS", 100);

This creates a constant named MAX_USERS with a value of 100. Constants are written in all uppercase letters and use underscores to separate words.

Finally, you can also use the global keyword to access global variables from within a function or method. For example:

$name = "John";

function greet() {
  global $name;
  echo "Hello, $name";
}

greet(); // Outputs "Hello, John"

Here is more information about variables in PHP.

https://www.w3schools.com/php/php_variables.asp

https://www.w3schools.com/php/func_misc_define.asp

Have fun with PHP because it is an awesome language to learn.

Peace!!