Difference between the and$ operator in php

PHP Server Side Programming Programming

$ operator

Operator is used to define variables in php. For example, message. Such variables can contain any type of value like int, string, etc.

$$ operator

$$ is a special operator that contains the name of another variable and can be used to access the value of that variable.

Example

Following the example, shows the usage of '′vs′$' operators.

Live Demo

<!DOCTYPE html>
<html>
<head>
   <title>PHP Example</title>
</head>
<body>
   <?php
      $welcome = "message";
      $message = "Welcome to Tutorialspoint";
      echo $welcome;
      print("<br/>");
      echo $$welcome;
   ?>
</body>
</html>