Difference between $var and $$var in PHP

In PHP, $var is used to store the value of the variable like Integer, String, boolean, character. $var is a variable and $$var stores the value of the variable inside it.

$var:

Syntax:

$variable = value;

• The $variable is the variable name
• The value is the initial value of the variable.

Example 1: This example stores and displays values with $.

hello Geeks<br/>1<br/>34<br/>

$$var: $$var stores the value of $variable inside it.

Syntax:

$variable = "value"; 
$$variable = "new_value";

• $variable is the initial variable with the value.
• $$variable is used to hold another value.

We can get another value by using the $value of the first variable.

Example 2: PHP program to demonstrates $$var.

hello
Hello php

Difference between Both: The variable $var is used to store the value of the variable and the variable $$val is used to store the reference of the variable.