Course Content
PHP is an object-oriented scripting programming language that allows web developers to create dynamic and interactive web pages. PHP stands for Hypertext Preprocessor (PHP).
Control Statement
A control statement is a statement that determines whether other statements will be executed.
PHP for Beginners
About Lesson

The $var is a normal variable with the name that stores any value like integer, float, etc.
The $$var is a reference variable that stores the value of the $var inside it.

$a = "abc";
$$a = 100;
echo $a."<br/>";
echo $$a."<br/>";
echo $abc;